Mas defense review

JSD Supply's Modular Universal Pistol 1, also known as the MUP-1, is an 80% Universal Insert that is compatible with the Sig Sauer® P320 multi caliber / frame modular weapons system. The remaining steps can be completed with a Dremel, Drill Press and the MUP-1 Jig (sold separately). - Compatible Frames: P250, P320 and EXO-1 Chassis System.

When it comes to managing your energy costs, understanding the various tariffs offered by National Grid MA is crucial. These tariffs determine the rates you pay for electricity and...Was this review helpful to you? 0 of 0 people found the following review helpful: Great!! July 8, 2023 ... Enter your email address for special offers from MAS Defense LLC. 8334 Pineville Matthews Rd Ste 103 #254 Charlotte, NC 28226 [email protected]. Let's Stay In Touch.MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity. ... Was this review helpful to you? 0 of 0 people found the following review helpful: Great part: April 23, 2024Introducing the Geisler Defence 80% Polymer 19X GEN 1-3 Compatible 80% Blank, a remarkable blank engineered with precision and innovation. This cutting-edge blank combines the best of both worlds, featuring a full-size grip while maintaining a compact slide rail length, making it the ideal choice for those seeking a versatile and comfortable ...MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity.Was this review helpful to you? 0 of 0 people found the following review helpful: A2 9mm compensator 1/2x36: July 9, 2020 ... Enter your email address for special offers from MAS Defense LLC. 8334 Pineville Matthews Rd Ste 103 #254 Charlotte, NC 28226 [email protected] 31, 2014 · MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity.

Are you considering pursuing a Master’s degree in Arts (MA) at the prestigious Indira Gandhi National Open University (IGNOU)? If so, it’s crucial to stay on top of the important d...Five-hundred milliamperes (mA) is equal to 0.5 amperes (A), which are also commonly called amps. In the metric system, an ampere is the unit for measuring and representing electric...I highly recommend the Vector rail and end cap and MAS Defense fast shipping. Was this review helpful to you? 0 of 0 people found the following review helpful: Really ties the build together: ... Enter your email address for special offers from MAS Defense LLC. 8334 Pineville Matthews Rd Ste 103 #254 Charlotte, NC 28226 [email protected] anyone have info, reviews or horror stories about mas defense? They seem like a smaller company so I can't find many reviews on them good or bad and their YouTube …MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity.

MAS Defense LLC is not and will not be held responsible for any city, county, state and/or federal laws that you (the purchaser) do not comply with. Due to the volatile nature and ever-changing laws regarding unfinished frames and lowers, these items are not returnable. ... Was this review helpful to you? 0 of 0 people found the following ...MAS DEFENSE 10.5" 223 WYLDE 5.56 Barreled Upper for an AR15 pistol build.MPN: MAG417-FDE. The MOE Trigger Guard (Magpul Original Equipment) is an enhanced polymer drop in replacement for the AR15/M4 weapons platform. It features a shallow "V" shape for better use of gloves in tactical shooting or cold weather operations. The MOE Trigger Guard is non-folding, has rounded edges, and fills the annoying "gap" at the ...The Polymer80 PF-Series Full Pistol Frame Parts Kit is compatible with the (Glock) PF940v2, PF940C, PF940SC frame assemblies. Giving the end user multiple options with one kit, Polymer80 has included two trigger shoe styles, curved and flat. Also, there are three options for the slide lock spring, compact, subcompact and full-size slide lock ...Are you looking to upgrade your current vehicle to a luxurious Mercedes? Westwood MA is home to some of the best Mercedes dealerships in the area. Whether you’re looking for a new ... I asked here a while ago about mas defense uppers as they didn't have a lot of reviews anywhere. they had the 13.7" barrel I was looking for so I wanted to throw a quick hands on review for anyone else looking into them.

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This website is well-known, scoring a fairly high score on our chart. We put to work 53 powerful factors to expose high-risk activity and see if masdefense.com is legitimate. Let's look at it and its industry through an in-depth review. You'll also learn how to detect and block scam websites and what you can do if you already lost your money.Buy MAS Defense At A Lower Price Of $41.50. Get 60 MAS Defense Coupon Code at CouponBirds. Click to enjoy the latest deals and coupons of MAS Defense and save up to 47% when making purchase at checkout. Shop masdefense.com and enjoy your savings of May, 2024 now!Includes the parts listed below. You can customize the kit to fit your needs by clicking on the drop down boxes above. - Complete Kit for AR15 - Black. - Gear Head Works Tailhook MOD 1 Pistol Brace. - 8.2" Pistol Buffer Tube - Fluted. - 3oz Carbine Buffer. - Standard Buffer Spring. - Standard End Plate.M4 Ramps, Forward Assist, Ejection Door. 2. Barrel - 16" 300 Blackout Barrel. Click on the drop down box above to choose from our selection. 3. Handguard - MAS Defense "Nero" 15" Slimline M-LOK Free Floating Handguard - (ID 1.25") 4. Gas Block - .750 Low Profile Steel Melonite Nitride Treated Gas Block. 5.16" .223 WYLDE AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL - FDE - BALLISTIC ADVANTAGE BARREL ... BA barrels are super accurate and Mas Defense has the best service. Was this review helpful to you? 0 of 0 people found the following review helpful: Fast shipping of a great product from Ballistic Ad:On February 23, 2024, Sen. Warren and Rep. John Garamendi (D-CA 8th District) sent a letter to the Secretary of Defense, expressing concerns about how the …

The Rhino RL556V3™ features Polymer80’s proprietary polymer composite, a solid core design, flared magwell, and heavier mil-spec buffer tube housing. The pistol grip area features a unique threadless design specific to Polymer80 rifle lowers. Included: - 80% Polymer AR-15 Lower Blank (Mil-spec) - Grip Nut. - Grip Screw.Dec 18, 2022 · MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity. Black Hardcoat Anodized Mil-Std-171 Type III. M4 Ramps, Forward Assist, Ejection Door. 2. Barrel - 10.5" 5.56 / .223 Barrel. Click on the drop down box above to choose from our selection. 3. Handguard - MAS Defense "Ridgeline" 12.62" Slimline M-LOK Free Floating Handguard - (ID 1.25") 4. Gas Block - .750 Low Profile Steel Melonite Nitride ...Add review; Store MAS Defense LLC (980) 265-1005 MASDefense.com 658 Griffith Rd Ste 111, Charlotte, North Carolina 28217 Overview. AR-15, AR-10 and Glock Parts ... Gun Store; E Commerce Website; Description. MAS Defense is committed to providing you "Quality Parts at Reasonable Prices". Our foundation is built on excellent customer service ...MAS DEFENSE 80% LOWER COMPLETION JIG AR-15 / AR-9 MPN: MAS0002202 The MAS Defense Complete 80% Jig Kit is all you need to complete the final machining process on your 80% AR-15 and AR-9 receiver. Includes: - Aluminum side plates with steel bushings - Three top plate templates - All necessary hardware - Made In the USA Drill Bits Needed:MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! ... Continuing to …Mounting is extremely simple with common tools and the handguard features alignment tabs to ensure it cannot rotate during vigorous movement. Specifications: -100% Made in the USA. -Material: 6061 Aluminum. -Finish: Hard Coat Anodizing (Black) -Lengths: 13”. -Weight: 13.28oz. -Inside Diameter: 1.34".MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity.

MAS Defense AR15 Slick Side Upper Receiver. No forward assist or ejection door capabilities. Forged From High-Grade 7075 T6 Aluminum. M4 Feed Ramps. No T-Marks. Black Hardcoat Anodized Mil-Std-171 Type III.

#1 · Jun 30, 2015. So, I'm going to be building my first AR hopefully sometime soon. I have spent countless hours researching parts and quality components. So with my parts list …GAS BLOCK ROLL PINS - SAE 1095 CARBON STEEL ZINC PLATED - SET OF 5. View Larger Photo Email A Friend. MSRP: $4.00. Our Price: $2.99. Stock Status: In Stock. Product Code: MAS00105002.I just finished building 4 AR Pistols with my boys, and ended up using MAS Defense barrels on all 4. We started out with 4 PSA stripped lowers, and then added Phase 5 pistol tubes and CMMG LPK's. After reading so many positive reviews and since they are based here in the Carolinas - I decided to go with them for the uppers - VERY HAPPY I DID!POLYMER80. >. POLYMER80 80% LOWER FRAME FULL SIZE G17 / G22 PF940S P80-BKS-FDE - FLAT DARK EARTH. View Larger Photo Email A Friend. MSRP: $149.00. Our Price: $129.99.Introducing the Geisler Defence 80% Polymer 19X GEN 1-3 Compatible 80% Blank, a remarkable blank engineered with precision and innovation. This cutting-edge blank combines the best of both worlds, featuring a full-size grip while maintaining a compact slide rail length, making it the ideal choice for those seeking a versatile and comfortable ... MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity. MAS Defense LLC is not and will not be held responsible for any city, county, state and/or federal laws that you (the purchaser) do not comply with. Due to the volatile nature and ever-changing laws regarding unfinished frames and lowers, these items are not returnable. ... Was this review helpful to you? 0 of 0 people found the following ...18" .223 WYLDE AR-15 BARRELED UPPER - MAS DEFENSE NERO 15" M-LOK RAIL - BALLISTIC ADVANTAGE BARREL SALE PRICE: $295.99 ... cant ask for anything more and will happily purchase again from MAS defense. Was this review helpful to you? 0 of 0 people found the following review helpful:MAS Defense LLC is not and will not be held responsible for any city, county, state and/or federal laws that you (the purchaser) do not comply with. Due to the volatile nature and ever-changing laws regarding unfinished frames and lowers, these items are not returnable.16" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL MAS DEFENSE 15" NERO M-LOK FREE FLOAT - BLACK AR-15 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE ... Was this review helpful to you? 0 of 0 people found the following review helpful: Hybrid polished chrome BCG: …

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Apr 13, 2024 · MAS Defense Reply: Patrick, I apologize for the issue. We have sold thousands of these Sylvan Conversion Blocks with 99% customer satisfaction. The block should have dropped in or at the most required very little pressure to slide into the magwell. Forcing it in to the point it cracked under pressure or left marks should not happen. MAS Defense LLC, Charlotte, North Carolina. 7,723 likes · 3 talking about this · 8 were here. AR-15, AR-10 and Glock Parts "Quality Parts at Reasonable Prices."Was wanting to buy from mas defense anyone have any reviews on them ? Was really wanting to get some stuff on there 👍 . comments sorted by Best Top New Controversial Q&A Add a Comment myfuckingnewaccount • Additional comment actions. They are …Dec 18, 2022 · MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity. MAS DEFENSE 12" SQUADRON LIGHTWEIGHT QUAD RAIL - BLACK. Proudly Made In The USA. Our "SQUADRON" quad rail with lightweight cuts make it feel as it it's floating on air. It is machined from 6061 aluminum and anodized with a Type III Class 2 Hardcoat. The rail itself weighs in at 12.4oz. Add the barrel nut and attaching screws for a total of 14.6oz.If you’re planning a trip from Port Chester, NY to Marlboro, MA, understanding the distance between these two cities is crucial. Whether you’re driving or taking public transportat...Mas Defense Supply is a division of Mas Industrial Supply LLC, which specializes in serving the defense industry and supplying critically important products. We are proud of the trust we add to human and social life by supplying high security class products needed by the defense industry with its expert staff and proven quality products and ...Thanks for any feedback. I had a 10.5 Wylde upper from them, they're legit. I own a few uppers from mas. Never an issue, but never needed customer service. I'd buy from again. Good to go! I have 2 uppers from them. Good to go just make sure to Inspect upon receipt - but that goes for anything.6' .300 Blackout Ballistic Advantage DRP Profile Pistol Length AR-15 Barrel - Modern Series - BABL300013M This .300 Blackout chambered 6 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.Jul 9, 2019 · Basically, the way I got them is how I will review them. I will say that the higher tier upper that I have is a lot lighter, and that is partly due to the handguard as it is not really a one size fits all handguard like the MAS defense one is. The barrel on the MAS defense is 1:8 twist 16”416R stainless steel, and spiral fluted. VECTOR 15" FREE FLOAT QUAD RAIL. View Larger Photo Email A Friend. MSRP: $75.00. Our Price: $64.99. Stock Status: (Out of Stock) Product Code: HG-VQRER. ….

7.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL .750 LOW PROFILE GAS BLOCK - STEEL MELONITE NITRIDE 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS …MPN: P80-BKSS-BLK. Polymer80 presents the BKSS™ 80% Subcompact Single Stack Frame. Offering compatibility with Glock® 43 Gen4 components, the PF9SS™ frame comes with an aggressive texture that emulates a stippled pattern, an extended beaver tail, double undercut trigger guard, and a thumb ledge. These features considerably enhance the ...razzlee21. • 10 yr. ago. I had a very good experience with MAS Defense. Very quick turn around from order to delivery. My shipping address and payment address were different so they required a phone call. Got through in three rings and had a pleasant conversation. I will be buying from them, again.We would like to show you a description here but the site won’t allow us.SALE PRICE: $79.99. MAS DEFENSE AR-10 .308 DPMS GEN 1 HIGH PROFILE BILLET UPPER RECEIVER - FLAT DARK EARTH. SALE PRICE: $84.99. Average Rating: 5 of 5 Total Reviews: 1 CLICK HERE TO WRITE A REVIEW ».A 15% cancellation fee will be charged to orders containing this part with shipping addresses in the above outlined cities or states. Fire/ Safe will either be engraved (black) or laser etched (white) on the left side only. Very fast shipping, excellent quality. Pla on doing more business in the future.2. Barrel - 5.25" 9MM NATO (9x19) 1x10 4150 CrMoV Melonite Nitride Treated Steel. 3. Handguard - MAS Defense "NERO" 4.2" Slimline M-LOK Free Floating Handguard - (ID 1.25") 4. Muzzle Device - A2 Half Cage. Bolt Carrier Groups and Charging Handles are sold separately. All barreled uppers are head spaced and test fired to ensure function.Defensive behavior occurs when an individual reacts to a perceived threat and begins using self-protective measures. Defensive behaviors come in a variety of forms, but typically t...Length: 9.87". Material: 6061-T6 Aluminum. Coating: Black Hardcoat Anodized Mil-Std-171 Type III. Weight including Hardware: 13oz. ID: 1.35" - (Requires use of "Slim" Muzzle Devices) Proudly Made In The USA. DESCRIPTION: Milled top pica-tinny rail to reduce weight. Quick Detach Mounts are built into the handguard at the rear positions.I going to be building a 20in "SPR" and was wondering on the quality of MAS Defense barrels. I saw their 20in .223 WYLDE and the price seems good. Their website has outstanding reviews but after searching them on google, I saw a post by a guy stating they rig their ratings by not allowing for any review less than 5 stars to be posted. Mas defense review, MAS Defense Uppers. Thread starter neal007; Start date May 29, 2014; Forums. The Hide Armory. Semi-Automatic Rifles . N. neal007 Private. Full Member. Minuteman. Feb 6, 2013 51 0 50 Powhatan,VA. May 29, 2014 #1 ; Anyone have any feedback on MAS Defense Ar pistol uppers? Thanks in advance. A. Abandoned ship …, Length: 9.87". Material: 6061-T6 Aluminum. Coating: Black Hardcoat Anodized Mil-Std-171 Type III. Weight including Hardware: 13oz. ID: 1.35" - (Requires use of "Slim" Muzzle Devices) Proudly Made In The USA. DESCRIPTION: Milled top pica-tinny rail to reduce weight. Quick Detach Mounts are built into the handguard at the rear positions., 25 Feb 2017 ... 13:06 · Go to channel · MAS Defense 300 BLK Blackout Upper FAXON Firearms Match Barrel First Look. 5 Star Guns & Gear•3.3K views · 7:06 &mi..., This sight’s two-piece design allows it to be mounted on firearms with pinned and welded muzzle accessories or barrels that are not drilled for a front sight post. It mounts easily and securely with four cap screws using a 7/64" Allen wrench. A sling swivel is included to aid in carrying your weapon. A bayonet lug is also included., 25 Feb 2017 ... 13:06 · Go to channel · MAS Defense 300 BLK Blackout Upper FAXON Firearms Match Barrel First Look. 5 Star Guns & Gear•3.3K views · 7:06 &mi..., Review of MAS Defense – 16” Stainless Steel (chambered 556) Mil-spec 1:8 twist barrel and Bolt carrier group I wanted to provide accurate and honest appraisal of both the service (of MAS defense) and the products I purchased for a recent AR15 build that was completed using MAS Defense supplied barrel and BCG., MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity., And for the Missile Defense Review, this is the 2022 Missile Defense Review. It’s the third iteration, the previous ones in 2019 and then in 2010, which I had a pretty big hand in in 2010 in the Obama administration. So I thought it’d be interesting to just look at a few points of continuity and then some important differences, really ..., It’s my first purchase from mas defense and honestly it was a shot in the dark. I was skeptical because of the price specifically. But turns out they make quality products. It’s not a billet upper but really let’s be honest, it’s still going to outlast me. I’m shooting .300 subsonic rounds and it hits., 30 Oct 2023 ... Go to channel · Deadly Force in Self-Defense: What You Need to Know - Critical Mas(s) Ep. 03 with Massad Ayoob. Wilson Combat•920K views · 25:21., March 28, 2016. : Eric S. Couldn't be happier. Range d with the .300 BLK and Ozark Ordnance 147gr FMJ. Zeroed at 50yds and moved to 100yds using a 4 MOA dot optical …, This website is well-known, scoring a fairly high score on our chart. We put to work 53 powerful factors to expose high-risk activity and see if masdefense.com is legitimate. Let's look at it and its industry through an in-depth review. You'll also learn how to detect and block scam websites and what you can do if you already lost your money., MAS Defense LLC is not and will not be held responsible for any city, county, state and/or federal laws that you (the purchaser) do not comply with. Due to the volatile nature and ever-changing laws regarding unfinished frames and lowers, these items are not returnable. ... Was this review helpful to you? 0 of 0 people found the following ..., Mar 5, 2015 · Mas Defense exchanged my 7.5 inch Barrel and offered and sent me a 10.5 inch as a replacement. Customer service was Top notch with follow ups during and after. , mas defense 9.87" nero m-lok free float - (fde) flat dark earth SALE PRICE : $84.99 Average Rating: 5 of 5 Total Reviews: 13 CLICK HERE TO WRITE A REVIEW » , 18 Feb 2024 ... ... reviews for the PEOPLE, not the industry? Make sure ... Defense With Doug Marcaida and Tomas Alas ... Mas Episode 17. Wilson Combat•1.1M views · 21 ..., AR-10 .308 BOLT CARRIER GROUP DPMS GEN 1 BCG - MELONITE NITRIDE. Melonite Nitriding treatment turns a standard chrome moly steel barrel into a very slick, hard and corrosion resistant barrel. Unlike chrome lining, the Melonite process is a treatment done to the surface instead of adding a layer of material. This treatment is done to both the ..., Barrel - 14.5" 5.56 / .223 1x7 Ballistic Advantage M4 Contour Profile 4150V Melonite Nitride - Modern Series BABL556009M. 3. Handguard - MAS Defense "Nero" 15" M-LOK Free Floating Handguard - (ID 1.25") 4. Gas Block - .750 Low Profile Steel Melonite Nitride Treated Gas Block. 5., The Magpul MOE Stock – Mil-Spec Model is a drop-in replacement buttstock for AR15/M16 carbines using mil-spec sized receiver extension tubes. Designed for light, fast action the streamlined A-frame profile avoids snagging and shields the release latch to prevent accidental activation., For $286, I got an assembled upper with a melonite BCG for $100 more. $286 at the time of order was only equivalent to full upper without the barrel and BCG. If I could do this upper again, it would have been all parts from AIM Surplus for a hair more with 2-3 times the quality. FC. 1. Reply., Thanks for any feedback. I had a 10.5 Wylde upper from them, they're legit. I own a few uppers from mas. Never an issue, but never needed customer service. I'd buy from again. Good to go! I have 2 uppers from them. Good to go just make sure to Inspect upon receipt - but that goes for anything., If you’re planning a trip from Port Chester, NY to Marlboro, MA, understanding the distance between these two cities is crucial. Whether you’re driving or taking public transportat..., Register at MAS Defense and Get 10% Discount First Order. May 23, 2024. 1 used. Click to Save. See Details. Find rare Register at MAS Defense and get 10% discount first order savings. Save on 10% OFF at masdefense.com. 30% OFF applied successfully. Time waits not, neither do great Coupon Codes. Free., Was this review helpful to you? 0 of 0 people found the following review helpful: polymer80 940v2 blank: August 24, 2023 ... Enter your email address for special offers from MAS Defense LLC. 8334 Pineville Matthews Rd Ste 103 #254 Charlotte, NC 28226 [email protected]., 10 Dec 2019 ... Log in · Sign up. Conversation. MAS DEFENSE · @MASDefense. Image. 3:48 AM · Dec 10, 2019., VECTOR 15" FREE FLOAT QUAD RAIL. View Larger Photo Email A Friend. MSRP: $75.00. Our Price: $64.99. Stock Status: (Out of Stock) Product Code: HG-VQRER. , MAS DEFENSE 9.87" SQUADRON LIGHTWEIGHT QUAD RAIL - BLACK. Proudly Made In The USA. Our "SQUADRON" quad rail with lightweight cuts make it feel as it it's floating on air. It is machined from 6061 aluminum and anodized with a Type III Class 2 Hardcoat. The rail itself weighs in at 11oz. Add the barrel nut and attaching screws for a total of 13oz. , Anybody purchase from MAS Defense? Anybody have any experience dealing with MAS Defense? I was looking at some of their uppers, but haven’t heard much about them. …, MAS Defense AR15 Flattop Stripped Upper Receiver. Forged From High-Grade 7075 T6 Aluminum. M4 Feed Ramps. Black Hardcoat Anodized Mil-Std-171 Type III., 16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 15" M-LOK RAIL - MID LENGTH GAS MAS DEFENSE 15" NERO M-LOK FREE FLOAT - BLACK M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID NICKEL BORON ... Was this review helpful to you? 0 of 0 people found the following review helpful: Titanium Nitride …, MAS DEFENSE RIOT 5.56 MUZZLE BRAKE - MELONITE NITRIDE - 1/2x28 TPI. 1/2 x 28 TPI for .223 / 556 NATO - Will NOT work with 9MM. ... Was this review helpful to you? 0 of 0 people found the following review helpful: Nice looking piece: February 16, 2019, MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity., MAS Defense is an AR-15, AR-10 and Glock parts store. We are committed to providing every customer with Quality Parts at Reasonable Prices! Our foundation is built on excellent customer service, honesty and integrity.