The Stern Defense AR-15 9mm Conversion Adapter allows the use of S&W M&P or Sig 320/250 magazines in any mil-spec AR-15 lower receiver.
Installation is quick and straightforward, with the added benefit of a last-round bolt hold open feature.
The adapter is machined from aircraft grade aluminum, ensuring a lightweight and durable construction.
The Stern Defense AR-15 M&P Conversion Adapter allows AR-15 owners to use .45 ACP rounds with M&P pistol magazines.
Installation is quick and easy on any mil-spec AR-15 lower, and the adapter includes a last-round bolt hold-open feature.
The adapter is precision machined from 6061-T6 aluminum with a 4140 NiB-coated feedramp, ensuring durability and reliability.
The Stern Defense 9mm AR-15 Bolt is compatible with both Glock and Colt magazines and fits standard and Glock-pattern upper receivers.
Manufactured from 8620 AISI steel with a Melonite finish, it ensures durability and corrosion resistance.
Comes fully assembled for easy installation and is designed for semi-automatic fire only, not compatible with full-auto fire-control groups.
The MAG-AD Ejector Replacement Kit is designed as an OEM replacement for Mag-AD series ejectors.
Made from heat-treated 1050 spring steel for durability.
Features an electroless-Nickel-coating for extended service life and corrosion resistance.
The kit is designed for rebuilding a well-used bolt, ideal after firing many rounds.
Includes a custom 4140 billet extractor and associated components for superior ejection performance.
It is specifically made for use with the SD BU9 bolt carrier from STERN DEFENSE, LLC.
The Stern Defense H2S Hybrid 2-Stage Trigger is a drop-in replacement for AR-15 platforms, combining mil-spec reliability with competition trigger precision.
It features a 2-pound first stage and a 4-pound second stage with a duty spring to prevent bump fires and ensure reset functionality.
This durable trigger unit has been tested for 250,000 rounds without failure and includes interchangeable springs for adjustable poundage.
The AR-15 Gen 2 Bolt Carrier is made from 8620 AISI steel with a Manganese Phosphate finish and is compatible with Mil-Spec and Glock®-pattern upper receivers.
It is designed to function with Colt SMG and Glock® magazines and is fully compatible with standard AR15/M16 charging handles.
The bolt carrier comes fully assembled with all necessary sub-components and is compatible with Law tactical folding stock and Fostech Echo Trigger.
The Stern Defense AR-15 SD-BU45 Bolt Carrier is specifically engineered for .45 ACP pistol-caliber carbines, ensuring reliability and durability.
It is made from 8620 AISI steel with a 4140 billet-steel extractor, features a Glock cut, and is treated with a manganese-phosphate finish for enhanced performance.
The bolt is compatible with single-stage triggers with short resets, Law Tactical folding-stock adapters, and Echo triggers, but requires an 11-ounce or heavier buffer and an upper receiver with an enlarged ejection port.
The Stern Defense 9mm Bolt is compatible with both Colt SMG and Glock magazines and works with standard AR15/M16 charging handles.
It is available with a Melonite or Nickel-Boron/Melonite finish and comes fully assembled with all necessary sub-components.
This bolt supports single stage triggers with short resets and is compatible with JP silent capture spring, Law Tactical folding stock adapter, and Echo triggers.
The Stern Defense MAG-AD Flare Mod1 magwell is compatible with Mil-Spec forged lower receivers and designed for use with Stern Defense MAG-AD9 or MAG-ADMP9&40 conversion adapters.
It is made from black Delrin, which is a durable material, ensuring that the magwell is sturdy and reliable for fast and smooth magazine changes.
This product is manufactured in the U.S.A., highlighting its American-made quality.
The Stern Defense SD Mod 4 9mm Upper Receiver is a complete assembly, ready for use with both Glock and Colt SMG magazines, featuring a 16.1in Melonited barrel and a 15in M-LOK Free Float handguard.
It includes a 9mm bolt, charging handle, and is compatible with the Law Tactical Folding Adapter, making it a convenient option for AR-15 enthusiasts.
Constructed with a 7075-T6 forged aluminum receiver and finished in black anodize, this upper receiver is manufactured in the U.S.A. by STERN DEFENSE, LLC.
The Stern Defense SD Mod 5 9mm Upper Receivers feature extended handguards and come with an SD HBC 9MM Blast Can to protrude the muzzle beyond the handguard.
Includes a complete assembly with a 9mm bolt and charging handle that supports both Glock and Colt SMG magazines, with a Melonite finish on the barrels.
Made in the U.S.A, these upper receivers are designed for AR-15 style rifles and adhere to all NFA rules.
The Stern Defense SD Mod 4 9mm Upper Receiver is a complete assembly with a 4-inch Melonited barrel and a 4-inch M-LOK Free Float handguard, designed for quick setup and immediate use.
It features a blast can muzzle device and a Stern Defense 9mm Bolt that is compatible with both Glock and Colt SMG magazines, enhancing versatility and shooting experience.
Made in the U.S.A, the upper receiver is constructed from 7075-T6 forged aluminum and finished with anodizing for durability, with a 1-10 twist barrel and ½-36 muzzle thread pitch.