Details
Stormborn 7.5-Inch Pistol-Gas 1:7 5.56 NATO AR-15 Free-Float M-LOK Handguard Pistol Complete Upper Build
The Stormborn Complete Upper is built around a 7.5-inch 5.56 NATO barrel machined from 4150 chrome moly vanadium steel in a contour profile, with a pistol-length gas system and a Manganese Phosphate finish. It pairs a "Panhead" billet upper receiver in a no forward assist configuration with a 7-inch black M-LOK handguard, and it ships with a complete bolt carrier group and a mil-spec quality M4 charging handle. The builder receives the core components of a working upper in one package. The short barrel keeps the front end compact and quick to handle, and the 1:7 twist rate suits a wide range of bullet weights in 5.56 NATO.
Key Features
- 7.5-inch contour profile barrel, 4150 chrome moly vanadium steel, Manganese Phosphate finish, 1:7 twist, 5.56x45mm NATO
- Pistol-length gas system with a micro low-profile gas block sized for a .750-inch gas journal
- "Panhead" billet upper receiver, 6061-T6 aluminum, anodized finish, no forward assist
- 7-inch M-LOK handguard, 6061-T6 aluminum, black
- AR-15 TPI GI birdcage flash hider, Manganese Phosphate finish, on 1/2x28 threads
- Complete AR-15 bolt carrier group (5.56/.223/.300/.350), 9310 alloy steel carrier, Nitride finish
- Mil-spec quality AR-15 M4 charging handle included
Barrel and Gas System
The 7.5-inch barrel is machined from 4150 chrome moly vanadium steel in a contour profile and finished in Manganese Phosphate, a matte, corrosion-resistant treatment that gives it a clean, uniform look. Its 1:7 twist rate is suited to a wide range of bullet weights in 5.56 NATO. The barrel runs a pistol-length gas system through a micro low-profile gas block sized for a .750-inch gas journal, and the low-profile block helps it sit cleanly beneath the handguard. At the muzzle, 1/2x28 threads carry the included AR-15 TPI GI birdcage flash hider, finished in Manganese Phosphate.
Upper Receiver and Handguard
The upper receiver is a "Panhead" billet unit machined from 6061-T6 aluminum and finished in anodizing, giving it a hard, wear-resistant surface that holds up to regular handling. It is built in a NOFA (no forward assist) configuration, which leaves the side of the receiver clean and uncluttered. It is paired with a 7-inch black M-LOK handguard machined from 6061-T6 aluminum, and the M-LOK slots give the builder room to mount lights, grips, handstops, and other accessories wherever the setup calls for them.
Bolt Carrier Group and Charging Handle
The included complete bolt carrier group is rated for 5.56, .223, .300 Blackout, and .350 Legend, with a carrier machined from 9310 alloy steel and finished in Nitride, a surface treatment that adds hardness and corrosion resistance and helps the carrier stand up to repeated cycling. Paired with it is a mil-spec quality AR-15 M4 charging handle, completing the upper so it is ready to be matched with a compatible lower receiver.
Compatibility
This upper is built for AR-15 lower receivers chambered in 5.56 NATO. Free-float or drop-in style, gas tube details, ejection port size and door configuration, and crush washer inclusion were not supplied with this listing and should be confirmed before purchase.
Follow all manufacturer instructions and safe handling practices.
Ensure compliance with all applicable federal, state, and local laws.
