Stern defense 9mm upper Each barrel throat is precision-machined with an extended free bore to accommodate bullets with a longer ogive, preventing common defensive rounds from jamming into the rifling before full chambering. Aug 15, 2022 · Stern Defense, LLC AR-15 SD MOD 4 9mm Upper Receiver 4IN M-Lok Complete For those that want something pre-assembled so they can jump right into the shooting part, the Stern Defense, LLC 9mm 4-inch upper is one helluva solution. 4" M-LOK Rail $446 72 In Stock Nov 6, 2023 · Magwell adaptors is pretty much what COLT factory 9mm AR's used. 10" Black Melonite Barrel 7075-T6 Aluminum Anodized Receiver $527 12 In Stock Stern Defense assembled upper receiver with dust cover and forward assist. BEST 9mm Self-Defense Round? - Federal Syntech Defense - • Video DON'T MISS THE DEALS, sub below. . Made Shop Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail | $10. Navigate Shop Sitemap Terms and Conditions Categories Home Shop CONTACT US FAQS MEDIA Popular Brands Stern Defense View All Info 20780 Suite A State Route JJ Summersville, MO. Stern Defense assembled u Shop Stern Defense MAG-AD9 AR-15 Glock 9mm/. 5 in 9mm Barrel w/MLOK Rail | $10. MAG-AD9 W/ MOD2 4'' KEYMOD 6''BARREL 9MM NiB-ECHO PISTOL UPPER KIT MSRP: $657. SD HBC 9MM Blast Can. Its compact form factor, reliability, and accuracy make it a fun and versatile firearm. Stern Defense assembled u Jan 16, 2025 · Overall, the Stern Defense AR-15 Pistol 9mm Luger Complete Upper Receiver Assembly is a well-made and high-performing component. Stern Defense specializes in manufacturing high-quality firearm parts and accessories. What’s in the box… It comes with 4” 1-10 twist barrel that is Melonite coated, and the receiver is Jul 3, 2019 · Recently got a CMMG Banshee 5" pistol and was wondering if the upper would work with the Stern Defense 9MM Glock mag block and a run of the mill AR15 pistol lower. By addressing this common problem, Stern Defense barrels prevent malfunctions that could leave a round stuck in the chamber and require manual clearing. 45 ACP. Stern Defense assembled u The FosTecH Complete 9mm Conversion Kit gives you a fast, dependable way to convert your AR to a compact 9mm carbine or pistol. The Mag-AD 9mm / . 2” diameter blast can designed to direct the short barreled blast away from the shooter. Mar 6, 2018 · So I want to build a 9mm upper for my SBR, and the Stern Defense magwell system seems to get good reviews (and it uses glock mags). 45 (Save $10. 7 Star Rating on 3 Reviews for Stern Defense SD Mod4 M-Lok 9mm Complete Upper Receiver Free 2 Day Shipping + Free Shipping over $49. 5" SD BU9 NiB Echo BCG SD HG12 MOD MLOK Handguard SD RBC9 Weight: 3. 5in or 4. Designed, Machined, and Assembled in Our Factory. ) Stern Defense 6 inch 9mm barrel. 65571 Call us at 4179321128 Subscribe to our newsletter Get the latest updates on new products and upcoming sales Feb 14, 2022 · Turn your mil-spec AR-15, M4, or M16 lower into a 9mm or . Upgrade firearm with our precision-engineered uppers. S. It’s an ideal choice for anyone looking for a compact, accurate, and reliable 9mm upper receiver. After receiving my upper, I test it at the range and I was at awe. Trusted by law enforcement and civilian gun enthusiasts alike, this adapter allows you to quickly convert your standard mil-spec AR-15, M4, or M16 lower Jul 16, 2024 · Made with 8620 AISI steel and boasting a Mag-Phosphate finish, the Stern bolt fits into Mil-Spec and Glock-pattern upper receivers. Stern Defense assembled u Oct 31, 2025 · MAG-AD9 W/ MOD5 8'' M-LOK 6'' BARREL 9MM PISTOL UPPER KIT WHATS INCLUDED!MAG-AD9Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. To convert, you'll also need a Stern MAG-AD9 magwell adapter, which allows the lower to accept Glock-pattern 9mm magazines. Thank you, Stern Defense, for finally meeting the wants and needs of so many M4 owners. SD CB9 COMPENSATOR BREAK. The Stern Defense AR-15 SD 10 MOD5 Upper Receiver Assembly features a mil-Spec flat top upper receiver with Stern Defense laser engraved dust cover and forward assist. The free float M-LOK handguard from Stern Defense offers excellent ergonomics while remaining MAG-AD9 W/ MOD5 8'' M-LOK 6'' BARREL 9MM PISTOL UPPER KIT WHATS INCLUDED!MAG-AD9Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. Feb 9, 2019 · The Stern Defense SD Mod 4 9mm Upper Receiver is a complete upper receiver featuring a 4 inch, 1-10 twist, Melonite finish barrel, is free float in a 4in M-LOK handguard attached to a 7075-T6 forged aluminum receiver. 0000 Full Get’s you my favorite AR pistol grip at the lowest possible price. 65571 Call us at 4179321128 Subscribe to our newsletter Get the latest updates on new products and upcoming sales Shop Stern Defense SD Mod4 M-Lok 9mm Complete Upper Receiver | $10. 2500 Full specification from $396. 33 Stern Defense MOD5 UPPER UPC: 860141001577 Caliber: 9mm Overall Length: 28. 25 lbs SD AR 15 Assembled Upper Receiver 7075-t6 aluminum Hard-coat anodized. Jan 23, 2025 · The Stern Defense AR-15 9mm Luger Complete Upper Receiver Assembly with the 6″ barrel is a solid choice for anyone looking to build a high-quality, compact PCC. Will come assembled. Stern Defense assembled u Dec 17, 2021 · WHATS INCLUDED! MAG-AD9 Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. Debating between the 6" and 8. Stern Defense 4 inch M-LOK rail (Barrel nut, bolts etc. 40 Magazine Conversion Adapter Best Rated + Free Shipping over $49. Then choose "Find Dealers". Jan 17, 2025 · The Stern Defense AR-15 Pistol 9mm Luger Complete Upper Receiver Assembly is a well-engineered and reliable component that stands out for its build quality and performance. Stern Defense SD Mod4 M-Lok Upper UPC: 850001176200 MPN: 015-SD4MOD4MLOK4BARREL9MMKK Caliber: 9mm Type: Upper Full specification from $361. Discover Stern Defense's selection of complete AR-15 uppers, available in 9mm, . SD CH1 Charging Handle Laser engraved. Made in U. ) Stern Defense 16. 5 inch barrel 9mm complete upper. The quality, the smoothness, and precision was worth it. We will also take a look at Stern Defense's upper and drop in flat trigger! more Jan 20, 2025 · The Stern Defense AR-15 Pistol 9mm Luger Complete Upper Receiver Assembly has been a great addition to my AR platform experience. 5in configurations), a dedicated 9mm bolt carrier group, and the Stern Defense 9mm magwell adapter so you can use Glock-style pistol magazines. Stern 9mm barrels provide firearm enthusiasts with a superior option for building a custom 9mm AR-15 upper group. 27 (Save $10. 47 Shop Stern Defense for premium firearm accessories, including top-tier magwell adapters, barrels, and conversion kits designed for enhanced performance and precision. Every Stern Defense barrel throat is precision-machined with a deeper free bore to accommodate bullets with a longer ogive. The MAG-AD MP9/40 + P320 installs in seconds with no permanent modifications—perfect for both law enforcement professionals and dedicated civilian shooters. It functions with Colt SMG, Glock magazines and it's fully compatible with standard AR15/M16 charging handles. The Mil-Spec flat top upper receiver includes a Stern Defense laser-engraved dust cover and forward assist. Includes a factory built made in the USA 🇺🇸 Stern Defense upper ++ Glock double stack Magwell adapter. Sep 28, 2025 · MAG-AD9 W/ MOD5 8'' M-LOK 6'' BARREL 9MM PISTOL UPPER KIT WHATS INCLUDED!MAG-AD9Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. 00) $419. Jun 30, 2025 · Mag-AD 9mm / . 6 Star Rating on 75 Reviews for Stern Defense MAG-AD9 AR-15 Glock 9mm/. Specifications: SD AR 15 Assembled Upper Receiver SD CH1 Charging Handle SD 9mm Barrel - 10. This upper receiver comes equipped with a 10-inch MLOK rail, providing ample space for accessory attachments. This kit bundles a complete Fostech upper (available in 7. Perfect for upgrading your AR-15, it offers top-tier durability and enhanced shooting accuracy for 9mm enthusiasts. 00 Off 5 Star Rating on 3 Reviews for Stern Defense AR-15 16. )Stern Defense 6 inch 9mm barrel. 1 inch Assembled 9mm Upper Receiver w/15 inch MLOK Rail + Free Shipping over $49. 1 inch 9mm barrel. 40 Magazine Conversion Adapter | 30% Off 4. 5" barrels for handguard / suppressor usage. 5 in 9mm Barrel w/MLOK Rail (5) List: $486. Upper is 8in hand guard, 6in barrel with a tucked in muzzle blast device, Magpul flipup sight, AFG grip and picatinny cover Nov 8, 2025 · 2 Stern Defense, LLC – AR-15 SD MOD 4 9mm Upper Receiver 4in M-LOK Complete Drop-in and shoot… This 4” 9mm Upper Receiver made by Stern Defense, LLC is an AR-15 SD Mod, is truly ready to go. ) Stern Defense 8. Jan 3, 2023 · Popup by POWr - 30649901WHATS INCLUDED! MAG-AD9 Stern Defense 4 inch M-LOK rail (Barrel nut, bolts etc. 5-36 thread protector and crush washer. Stern Defense assembled upper receiver with dust cover and forward assist. It comes complete and fully assembled and is compatible with Glock and Colt SMG magazines. 94 Stern Defense MOD5 UPPER UPC: 860141001560 Caliber: 9mm Overall Length: 30. The system is designed Shop Stern Defense SD BU9 9mm Bolt Carrier for AR-15 Glock-Pattern Upper Receiver | 28% Off 4. Stern Defense AR-15 Pistol 9mm Luger Complete Upper Receiver Assembly 4" Barrel Free Float M-LOK Hand Guard Matte Black Please enter your ZIP Code below, to find the closest FFL Dealer in your area. Sep 27, 2021 · WHATS INCLUDED! MAG-AD9 Stern Defense 12 inch M-LOK rail (Barrel nut, bolts etc. 3 Product (s) Sort By: Stern Defense 015-SD4MOD4MLOK4BARREL9MMKK DEF. Watched videos and reviews how well Stern Defense 9mm holds up and I was very impressed how sustainable the barrel is. ) Stern Defense 4 inch 9mm barrel. Pistol Upper 9mm 4" BBL. WHATS INCLUDED! MAG-AD9 Stern Defense 10 inch M-LOK rail (Barrel nut, bolts etc. The free float M-LOK handguard from Stern Shop Stern Defense AR-15 10 inch Assembled Upper Receiver, 8. i bought a stern 9mm upper receiver, specifically the stern defense 10 inch MOD5 8. 00 Off 4. The free float M-LOK handguard from Stern Defense offers Lets take a look at the Stern Defense 9mm Conversion for the AR-15. The Stern Defense 9mm Upper is crafted from aircraft-grade aluminum with a durable anodized finish for long-lasting performance. 45 ACP calibers. Due to multiple compatibility issues and variations from normal PCC bolt geometry; certain BCA bolts can create UNSAFE operating conditions. SD CH1 enhanced charging handle. SD HBC 9MM Blast Can. with Colt mags. general feedback and/or tips is appreciated as i’m sure there is more for me to learn when it comes to building out a This is a new Stern Defense MOD4 complete Glock compatible complete upper receiver chambered in 9mm Luger. just curious to see if anyone has experience with stern products? i’m in the process of gathering parts for my first 80% build (also my first build ever). Aug 23, 2023 · WHATS INCLUDED! MAG-AD9 Stern Defense 15 inch M-LOK rail (Barrel nut, bolts etc. 40 S&W powerhouse using your M&P, P320, or P250 magazines. Navigate Shop Sitemap Terms and Conditions Categories Home Shop CONTACT US FAQS MEDIA Popular Brands Stern Defense View All Info 20780 Suite A State Route JJ Summersville, MO. 45 Best Rated Shop Stern Defense AR-15 16. 6061 aircraft grade aluminum billet Hard coat anodized. The Stern Defense SD Mod 4 9mm Upper Receiver is a complete, ready to go, upper receiver solution for those looking to spend less time building and more time shooting. They worked fine. This handguard is M-LOKcompatible to accept your favorite attachments. Just swap on a 9mm upper and you can convert your AR into a pistol caliber carbine. Sturdy Construction. 00 Off Highly Rated on 5 Reviews for Stern Defense AR-15 6 inch Assembled 9mm Upper Receiver w/ 8 inch MLOK Rail + Free Shipping over $49. Oct 9, 2025 · MAG-AD9 W/ MOD5 8'' M-LOK 6'' BARREL 9MM PISTOL UPPER KIT WHATS INCLUDED!MAG-AD9Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. It features a 4-inch barrel, MBC blast can, free float M-LOK handguard, full length picatinny rail for optic mounting, BU9 Glock cut bolt, engraved dust cover, and a CH1 Enhanced charging handle. Stern Defense 015SD15INCHMOD4MLOK161 9mm 16. Stern Defense AR 9mm MOD4 MLOK Complete Upper - 4" Stern Defense 4 inch M - LOK rail (Barrel nut, bolts etc. SD RBC 9MM Blast Can. We appreciate the time, resources, and effort you clearly put into making the best 9mm upper I have ever owned. Featuring true last-round hold open, this is one of the most trusted magazine conversion systems available today. Handguard The free float M-LOKhandguard from Stern Defense offers excellent ergonomics while remaining lightweight and strong. 1 inch Assembled 9mm Upper Receiver w/15 inch MLOK Rail excels in its primary function: converting an AR-15 lower into a reliable 9mm PCC. The free float M-LOK handguard from Stern Defense offers excellent Jan 25, 2025 · The Stern Defense AR-15 Pistol 9mm Luger Complete Upper Receiver Assembly is a well-engineered product that delivers on its promise of a compact, reliable, and accurate upper receiver. I have assembled quite a few Glock mag AR-9's and all have been accurate, reliable and great fun. Explore Stern Defense for high quality weapon accessories, AR15 conversion kits and Stock Adapters. Stern Defense assembled u Stern 9mm barrels are designed for firearm enthusiasts looking to build a dedicated 9mm AR-15 upper group, offering a performance advantage over standard barrels. 44 $601. 00 Off 5 Star Rating on 5 Reviews for Stern Defense AR-15 10 inch Assembled Upper Receiver, 8. 56 AR-15 lower. May 17, 2018 · Stern Defense makes the MAG-AD9, a magazine adapter that allows you to use Glock magazines in an AR-15. SD MBC 9MM Blast Can. Oct 13, 2025 · MAG-AD9 W/ MOD5 8'' M-LOK 6'' BARREL 9MM PISTOL UPPER KIT WHATS INCLUDED!MAG-AD9Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. On the end of the barrel mounted on the ½-36 threads is a 1. 5 in 9mm Barrel w/MLOK Rail Best Rated + Free Shipping over $49. 5-inch barrel crafted from 4150 Chrome Moly Steel, finished in Black Melonite for enhanced longevity. Stern Defense SD BU9 Glock cut bolt. Upgrade your firearm with us. The Stern Defense AR-15 SD4 MOD4 upper is a 9mm AR upper designed to work on a standard 5. No reason the Stern Defense would not work well with a proper upper. Dec 22, 2023 · Awesome way to convert your AR into a 9mm PCC in under 3 minutes. The free float M-LOK handguard from Stern Defense offers excellent Explore Stern Defense's premium AR-15 conversion kits, designed for seamless caliber transitions to 9mm, . Would Nov 6, 2025 · The Stern Defense AR-15 16. Featuring a 4150 chrome moly steel barrel with a 1:10" twist, this 4" upper is designed for precision and reliability. 00) $476. Information: Handguard. Find the best way to Convert your AR15 to accept pistol caliber magazines Jun 24, 2025 · The Stern Defense AR-15 Pistol 9mm Luger Complete Upper Receiver Assembly 4″ Barrel Free Float M-LOK Hand Guard Matte Black promises to be a game-changer for AR-15 pistol builds. A. If you would like a different muzzle device please take a look at our Stern Defense SD Mod4 M-Lok 9mm Complete Upper Receiver (3) List: $429. Introducing a high-performance upper receiver designed for precision and durability, the Stern Defense 9mm Upper Receiver features an 8. 40 S&W, and . 75” long, 1. 7 Star Rating on 6 Reviews for Stern Defense SD BU9 9mm Bolt Carrier for AR-15 Glock-Pattern Upper Receiver Best Rated + Free Shipping over $49. 27 Free 2 Day Shipping Stern Defense AR-15 10 inch Assembled Upper Receiver, 8. 40 S&W Glock Magazine Adapter is Stern Defense’s flagship product, the one that put us on the map. A 33-round magazine is included. My preference is to use dedicated Glock mag PCC receiver sets. 5 inch 9mm barrel. Sturdy construction. 40 S&W Glock Magazine Adapter Revolutionizing AR Builds. . Apr 2, 2025 · Sp33dy's Review of Stern Defense SD Mod4 M-Lok 9mm Complete Upper Receiver Great upper receiver couldn’t pass on a deal when it went on sale. I use the Frontier Armory lowers that Joe Bobs offers under their STERN DEFENSE DOES NOT RECOMMEND THE USE OF BEAR CREEK ARSENAL BOLTS. Oct 4, 2025 · MAG-AD9 W/ MOD5 8'' M-LOK 6'' BARREL 9MM PISTOL UPPER KIT WHATS INCLUDED!MAG-AD9Stern Defense 8 inch M-LOK rail (Barrel nut, bolts etc. 1 inch Assembled 9mm Upper Receiver w/15 inch MLOK Rail | $10. Upgrade your shooting experience with our reliable, American-made products, trusted by professionals and enthusiasts alike. pubddpslnynkogjzqrpobelfdbbnlsfhgbqdqxeqprmumjcevdmteatkqzqesnbxvzzabcbssiqc