Details
Warden Duty 16-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Rifle Full Build Kit
The Warden Duty is a 5.56 NATO AR-15 Full Build Kit built around a 16-inch carbine-length gas platform. The kit centers on a 16-inch medium profile barrel in 4150 CrMoV steel with a nitride finish, 1:7 twist rate, and 1/2x28 thread pitch, paired with an A2 birdcage flash hider and a black 1/2-inch crush washer. A 0.750 gas block and a carbine-length gas tube are included on the front end. The upper receiver is a USA-made 6061 slick side billet design in 6061-T6 aluminum with a Type III Class 2 hardcoat anodized finish and an anti-rotation cutout, paired with a 15-inch freefloat Keymod handguard. A USA-made AR-15 complete bolt carrier group compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend, and a Mil-Spec AR-15 M4 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position buffer tube, a standard 3 oz carbine buffer, a USA-made standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The Special Operations adjustable stock rounds out the kit. Lower receiver not included.
Key Features
- 16-inch medium profile barrel, 4150 CrMoV steel, nitride finish, 1:7 twist, 1/2x28 thread pitch
- Carbine-length gas system
- Carbine-length gas tube
- 0.750 gas block
- A2 birdcage flash hider, 1/2x28, black crush washer included
- USA-made 6061 slick side billet upper receiver, 6061-T6 aluminum, Type III Class 2 hardcoat anodized, anti-rotation cutout
- 15-inch freefloat Keymod handguard
- USA-made AR-15 complete bolt carrier group, 5.56 NATO and .223 and .300 Blackout and .350 Legend compatible
- Mil-Spec AR-15 M4 charging handle
- Complete Mil-Spec AR-15 lower parts kit
- Mil-Spec heavy-duty 6-position buffer tube
- Standard carbine buffer, 3 oz
- Standard AR-15 carbine recoil spring, made in USA
- AR-15 M16 Mil-Spec receiver end plate
- AR-15 carbine castle nut
- Special Operations adjustable stock
Perfect For
- Builders sourcing a complete 5.56 NATO AR-15 full build kit with a USA-made slick side billet upper and USA-made BCG already included, pairing it with their own lower receiver
- Shooters building a 16-inch carbine-gas rifle platform who want a 15-inch freefloat Keymod handguard and Special Operations adjustable stock covered in one kit
- AR-15 builders who want a 4150 CrMoV nitride barrel and complete lower parts kit included without sourcing components separately
Barrel and Muzzle Device
The 16-inch medium profile barrel is chambered in 5.56 NATO and constructed from 4150 CrMoV steel with a nitride finish. The twist rate is 1:7 and the thread pitch is 1/2x28, which matches the included A2 birdcage flash hider. A black 1/2-inch crush washer and a 0.750 gas block paired with a carbine-length gas tube cover the front end gas configuration on this carbine-length platform.
Slick Side Billet Upper Receiver and Handguard
The USA-made 6061 slick side billet upper receiver is 6061-T6 aluminum with a Type III Class 2 hardcoat anodized finish and an anti-rotation cutout. The slick side design removes the forward assist housing from the upper receiver body for a clean exterior profile. The 15-inch freefloat Keymod handguard provides Keymod attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-15 platform.
Bolt Carrier Group and Charging Handle
The USA-made AR-15 complete bolt carrier group is compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set.
Lower Parts Kit and Buffer System
The complete Mil-Spec AR-15 lower parts kit covers the internal lower receiver components. The buffer system includes a Mil-Spec heavy-duty 6-position buffer tube, a standard 3 oz carbine buffer, a USA-made standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The Special Operations adjustable stock rounds out the kit, covering the rear stock interface for this build.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.
