Details
Warden 11.5-Inch Carbine-Gas 1:8 .223 Wylde AR-15 Free-Float KeyMod Handguard Pistol Full Build Kit with SB Tactical SBA3 Brace
The Warden 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 black free-float KeyMod handguard machined from 6061-T6 aluminum and an SB Tactical SBA3 adjustable pistol stabilizing brace in black, mounted on a mil-spec heavy-duty six-position buffer tube. The kit ships with a US-made complete bolt carrier group and a mil-spec quality 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, and castle nut 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 steel gas block sized for a .750-inch barrel
- 7075-T6 aluminum upper receiver with M4 feed ramps, anodized finish
- Free-float KeyMod handguard, 6061-T6 aluminum, black
- AR-15 A2 TPI GI birdcage flash hider, rated for 5.56/.223, on 1/2x28 threads
- Complete AR-15 bolt carrier group (5.56/.223/.300/.350), made in the USA, 9310 alloy steel carrier, Nitride finish
- Mil-spec quality AR-15 M4 charging handle included
- Mil-spec heavy-duty six-position buffer tube (tube only), 3 oz. buffer, standard carbine-length buffer spring, and mil-spec AR-15/M16 receiver end plate
- SB Tactical SBA3 adjustable pistol stabilizing brace
- Lower receiver is not included.
Barrel and Gas System
The 11.5-inch KAK Industry barrel 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 steel 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 A2 TPI GI birdcage flash hider.
Upper Receiver and Handguard
The upper receiver is machined from 7075-T6 aluminum with M4 feed ramps and an anodized finish, giving it a hard, wear-resistant surface that holds up to regular handling. It is paired with a black KeyMod handguard machined from 6061-T6 aluminum. As a free-float design, it leaves the barrel free of handguard contact, and the KeyMod slots give the builder room to mount lights, grips, handstops, and other accessories.
Bolt Carrier Group and Charging Handle
The included complete bolt carrier group is made in the USA and 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.
Buffer System and Brace
The kit includes a mil-spec heavy-duty AR-15 six-position buffer tube, listed as the tube only, along with a 3-ounce buffer, a standard carbine-length buffer spring, and a mil-spec AR-15/M16 receiver end plate. An SB Tactical SBA3 adjustable pistol stabilizing brace is included and slides onto and adjusts along the mil-spec buffer tube used in this build.
Compatibility
This kit is built for AR-15 lower receivers and .223 Wylde builds. Handguard length, lower parts kit, pistol grip, and castle nut inclusion, as well as 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.
