7.5″ 5.56 DRP Pistol Quad Rail Complete Upper
The 7.5″ 5.56 DRP Pistol Quad Rail Complete Upper is a rugged, reliable option for shooters looking to build a compact AR pistol without compromising on quality. Built around a mil-spec forged upper receiver with M4 feed ramps, this complete upper features a 7.5″ 5.56 NATO barrel treated with black nitride for improved wear and corrosion resistance.
The pistol-length gas system pairs a nitrided steel APOC Armory gas block with a stainless steel gas tube for reliable cycling, even in high-volume shooting. It’s topped with a Jet-Black nitride-coated A2 birdcage flash hider and surrounded by an American-made Dirty Bird free-float quad-rail handguard, providing a durable, modular platform for accessories.
This upper includes an AO Precision Mil-Spec Phosphate BCG (availability may vary), plus a properly torqued barrel nut and muzzle device, secured with Permatex 242 and AEROSHELL 33MS anti-seize grease—a BRD signature for long-term reliability.
Specifications
- Upper Receiver: Mil-Spec 7075-T6 Aluminum w/ M4 Feedramps
- Barrel: 7.5″ 5.56 NATO, Nitride Finish, 1:7 Twist
- Gas System: Pistol Length
- Gas Block: APOC Armory Nitrided Steel
- Gas Tube: Stainless Steel, Pistol Length
- Handguard: Dirty Bird Free Float Quad Rail, 6061 Aluminum
- Bolt Carrier Group: AO Precision Mil-Spec Phosphate (may vary)
- Muzzle Device: 3.25″ 6061 Aluminum Flash Can in a hard-anodized finish
- Origin: American-made
Ideal for close-quarters or range-ready AR pistol builds, this upper delivers durability, performance, and BRD-quality craftsmanship—without the inflated price tag.









