Davidson Defense Orbit 6-inch Pistol-Gas 1:7 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Orbit 6-inch Pistol-Gas 1:7 .300 BLK AR-15 Freefloat M-LOK Pistol Full Build Kit, SBR Ready

The Orbit is a .300 AAC Blackout AR-15 Full Build Kit configured for the SBR Ready designation, built around a compact 6-inch pistol-length gas platform. The kit centers on a 6-inch steel barrel with a nitride finish, 1:7 twist rate, and 5/8x24 thread pitch, paired with a .308 compatible muzzle-mounted fake suppressor. A micro low-profile steel gas block at 0.750 diameter and a pistol-length gas tube are included on the front end. The 7000 Series optimized AR-15 upper receiver carries a Type III hardcoat anodized black finish with a dust cover pin retention feature and an ejection port door assembly, paired with a 7-inch Blem freefloat M-LOK handguard featuring a full-length Picatinny top rail and integrated QD sling mounts. A USA-made complete AR-15 bolt carrier group compatible with .223 Remington, 5.56 NATO, .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 aluminum carbine buffer tube, a standard 3 oz carbine buffer, a USA-made standard carbine recoil spring, a Mil-Spec M16 end plate, and a Mil-Spec AR-15 castle nut. This kit ships without a brace and is intended for customers selecting their own final setup. Lower receiver not included.

Key Features

• 6-inch 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
• Muzzle-mounted fake suppressor, .308 compatible, 5/8x24
• 7000 Series optimized AR-15 upper receiver, Type III hardcoat anodized black, dust cover pin retention feature, ejection port door assembly
• 7-inch Blem freefloat M-LOK handguard, full-length Picatinny top rail, integrated QD sling mounts
• USA-made complete AR-15 bolt carrier group, .223 Remington and 5.56 NATO 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 aluminum carbine buffer tube
• Standard carbine buffer, 3 oz
• Standard carbine recoil spring, made in USA
• Mil-Spec M16 end plate
• Mil-Spec AR-15 castle nut
• SBR Ready configuration

Perfect For

• Builders sourcing a complete .300 AAC Blackout AR-15 pistol full build kit with a 6-inch nitride barrel, Type III hardcoat anodized upper receiver, USA-made BCG, and 7-inch Blem freefloat M-LOK handguard with integrated QD sling mounts already included, pairing it with their own lower receiver and selecting their own rear brace or stock at a Blem handguard price point
• Shooters building a compact 6-inch pistol-gas .300 BLK platform who want the USA-made BCG, charging handle, and complete buffer system covered without a rear interface commitment
• AR-15 pistol builders who want a .300 AAC Blackout full build kit with a muzzle-mounted fake suppressor at 5/8x24 and a 7-inch Blem freefloat M-LOK handguard in an SBR Ready configuration without sourcing components separately

Barrel and Muzzle Device

The 6-inch 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 .308 compatible muzzle-mounted fake suppressor. 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 7000 Series optimized AR-15 upper receiver carries a Type III hardcoat anodized black finish with a dust cover pin retention feature and an ejection port door assembly. The 7-inch freefloat M-LOK handguard is a Blem unit featuring a full-length Picatinny top rail and integrated QD sling mounts, with M-LOK attachment points along the body for accessory mounting. Blem handguards may exhibit minor cosmetic imperfections that do not affect function.

Bolt Carrier Group and Charging Handle

The USA-made complete AR-15 bolt carrier group is compatible with .223 Remington, 5.56 NATO, .300 Blackout, and .350 Legend. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set.

SBR Ready Configuration

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 carbine buffer, a USA-made standard carbine recoil spring, a Mil-Spec M16 end plate, and a Mil-Spec AR-15 castle nut. This kit ships without a brace, with the brace or stock selection remaining with the buyer.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Ships without a brace. Do not attach a stock unless compliant with applicable laws. Lower receiver not included.