Davidson Defense Dark Knight w/SBA3 Brace 6-inch Pistol-Gas 1:7 .300 BLK AR-15 Freefloat M-LOK Handguard Pistol Full Build Kit

Dark Knight SBA3 Brace 6-inch Pistol-Gas 1:7 .300 BLK AR-15 Freefloat M-LOK Pistol Full Build Kit

The Dark Knight is a .300 AAC Blackout AR-15 Full Build Kit built around a compact 6-inch pistol-length gas platform. The kit centers on a 6-inch standard profile steel barrel with a nitride finish, 1:7 twist rate, and 5/8x24 thread pitch, paired with a Pershing flash can in steel at 5/8x24 and a black crush washer. A micro low-profile steel gas block at 0.750 diameter and a pistol-length gas tube are included on the front end. The 7075-T6 aluminum anodized upper receiver features M4 feed ramps, an ejection port door assembly, and a forward assist, paired with a 7-inch Airlite Series lightweight honeycomb design freefloat M-LOK handguard with a full-length Picatinny top rail and black anodized finish. A USA-made complete AR-15 bolt carrier group compatible with 5.56 NATO, .223 Remington, .300 AAC 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 aluminum carbine buffer tube, a standard 3 oz AR-15 carbine buffer, a standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec end plate, and an AR-15 carbine castle nut. The SB Tactical SBA3 multi-position adjustable pistol stabilizing brace in black reinforced polymer features an integrated QD sling socket, a lightweight skeletonized design, and adjustable length of pull, compatible with Mil-Spec carbine buffer tubes. Lower receiver not included.

Key Features

• 6-inch standard profile steel barrel, nitride finish, 1:7 twist, 5/8x24 thread pitch, .300 AAC Blackout
• Pistol-length gas system
• Pistol-length gas tube
• Micro low-profile steel gas block, 0.750
• Pershing flash can, steel, 5/8x24, black crush washer included
• 7075-T6 aluminum upper receiver, anodized, M4 feed ramps, ejection port door assembly, forward assist
• 7-inch Airlite Series lightweight honeycomb freefloat M-LOK handguard, black anodized, full-length Picatinny top rail
• USA-made complete AR-15 bolt carrier group, 5.56 NATO and .223 Remington and .300 AAC 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 aluminum carbine buffer tube
• Standard AR-15 carbine buffer, 3 oz
• Standard AR-15 carbine recoil spring
• AR-15 M16 Mil-Spec end plate
• AR-15 carbine castle nut
• SB Tactical SBA3 multi-position adjustable pistol stabilizing brace, black reinforced polymer, integrated QD sling socket, lightweight skeletonized design, adjustable length of pull, Mil-Spec carbine buffer tube compatible

Perfect For

• Builders sourcing a complete .300 AAC Blackout AR-15 pistol full build kit with a 6-inch nitride barrel, 7075-T6 anodized upper receiver, USA-made BCG, 7-inch Airlite Series honeycomb freefloat M-LOK handguard, and SBA3 multi-position adjustable brace with integrated QD socket already included, pairing it with their own lower receiver
• Shooters building a compact 6-inch pistol-gas .300 BLK platform who want the USA-made BCG, charging handle, complete lower parts kit, Mil-Spec carbine buffer tube, and SBA3 adjustable brace with lightweight skeletonized design and adjustable length of pull covered in one kit
• AR-15 pistol builders who want a .300 AAC Blackout full build kit with a Pershing flash can at 5/8x24 and a 7-inch Airlite Series honeycomb freefloat M-LOK handguard without sourcing components separately

Barrel and Muzzle Device

The 6-inch standard profile barrel is chambered in .300 AAC Blackout and constructed from steel with a nitride finish. The twist rate is 1:7 and the thread pitch is 5/8x24, which matches the included Pershing flash can in steel. A black crush washer, a micro low-profile steel gas block at 0.750 diameter, and a pistol-length gas tube cover the front end gas configuration on this pistol-length platform.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries an anodized finish with M4 feed ramps, an ejection port door assembly, and a forward assist. The 7-inch Airlite Series freefloat M-LOK handguard features a lightweight honeycomb design construction, a black anodized finish, a full-length Picatinny top rail, and M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-15 pistol platform.

Bolt Carrier Group and Charging Handle

The USA-made complete AR-15 bolt carrier group is compatible with 5.56 NATO, .223 Remington, .300 AAC 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 aluminum carbine buffer tube, a standard 3 oz AR-15 carbine buffer, a standard AR-15 carbine recoil spring, an AR-15 M16 Mil-Spec end plate, and an AR-15 carbine castle nut. The SB Tactical SBA3 multi-position adjustable pistol stabilizing brace in black reinforced polymer features an integrated QD sling socket, a lightweight skeletonized design, and adjustable length of pull, pairing with the included Mil-Spec carbine buffer tube and covering the rear brace interface for this pistol lower build kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local and state laws regarding pistol brace use and classification.