Details
Aegis Lightweight 11.5-Inch Carbine-Gas 1:8 .223 Wylde AR-15 Free-Float M-LOK Handguard Pistol Full Build Kit with SB Tactical SBA5 Brace
The Aegis Lightweight Full Build Kit is built around an 11.5-inch KAK Industry .223 Wylde barrel machined from 4140 chrome moly vanadium steel in a government profile, with a carbine-length gas system and a Nitride finish. It is paired with a 10-inch black free-float handguard and an SB Tactical SBA5 pistol stabilizing brace molded from nylon-reinforced polymer. The kit ships with a complete bolt carrier group and an M4 charging handle. The short barrel keeps the front end compact and quick to handle, and the 1:8 twist suits a wide range of bullet weights in .223 Wylde. Lower receiver is not included. Lower parts kit, pistol grip, buffer tube, buffer, recoil spring, castle nut, and end plate details were not supplied with this listing.
Key Features
- 11.5-inch KAK Industry government profile barrel, 4140 CrMoV steel, Nitride finish, 1:8 twist, .223 Wylde chamber
- Carbine-length gas system with a micro low-profile gas block sized for a .750-inch barrel
- 7075-T6 aluminum upper receiver, anodized finish
- 10-inch free-float handguard, aircraft-grade aluminum, black
- AR-15 TPI GI birdcage flash hider on 1/2x28 threads
- Complete AR-15 bolt carrier group (5.56/.223/.300/.350), 9310 alloy steel carrier, Nitride finish
- AR-15 M4 charging handle included
- SB Tactical SBA5 pistol stabilizing brace, nylon-reinforced polymer, black
- Lower receiver is not included.
Barrel and Gas System
The 11.5-inch barrel from KAK Industry is machined from 4140 chrome moly vanadium steel in a government profile and finished in Nitride, a surface treatment that adds hardness and corrosion resistance while leaving a clean, matte black look. Its 1:8 twist rate and .223 Wylde chamber make it suited to a wide range of bullet weights. The barrel runs a carbine-length gas system through a micro low-profile gas block sized for the .750-inch barrel diameter, and the low-profile block helps it sit cleanly beneath a free-float handguard. At the muzzle, 1/2x28 threads carry the included AR-15 TPI GI birdcage flash hider.
Upper Receiver and Handguard
The upper receiver is machined from 7075-T6 aluminum and finished in anodizing, giving it a hard, wear-resistant surface that holds up to regular handling. It is paired with a 10-inch black free-float handguard machined from aircraft-grade aluminum. As a free-float design, it leaves the barrel free of handguard contact, keeping the front end clean and light.
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 an AR-15 M4 charging handle, completing the upper so it is ready to be matched with a compatible lower receiver.
Brace
An SB Tactical SBA5 pistol stabilizing brace in black is included, molded from nylon-reinforced polymer. Buffer tube compatibility details for the brace were not supplied with this listing and should be confirmed before purchase.
Compatibility
This kit is built for AR-15 lower receivers and .223 Wylde builds. Lower parts kit, pistol grip, buffer tube, buffer, recoil spring, castle nut, and end plate inclusion, as well as handguard attachment system, feed ramp style, and ejection port door and forward assist configuration, 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.
