Davidson Defense Flowback w/SBA3 Brace 5.5-inch 1:16 10MM AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Davidson Defense Flowback SBA3 Brace 5.5-inch 10mm AR-15 Freefloat M-Lok Pistol Full Build Kit

The Davidson Defense Flowback is a 10mm AR-15 Full Build Kit built around a compact 5.5-inch platform. The kit centers on a 5.5-inch 10mm barrel in 4150 CrMoV steel with a black nitride finish, 1:16 twist rate, and 5/8x24 thread pitch, paired with a Pershing 5/8x24 steel flash can in Type III hardcoat anodized finish. The upper receiver is a 6061 pistol caliber billet design in 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish, paired with a 4.2-inch freefloat M-Lok handguard in 7075-T6 aluminum in black. A PCC AR bolt assembly for 10mm in 9310 alloy steel with a nitride finish and a Mil-Spec AR-15 M4 charging handle complete the upper side. The lower hardware includes a Mil-Spec heavy-duty 6-position buffer tube in aluminum, an 8 oz buffer, a recoil spring, an end plate, and a castle nut. The SB Tactical SBA3 adjustable pistol stabilizing brace is included. Lower receiver not included.

Key Features

• 5.5-inch 10mm barrel, 4150 CrMoV steel, black nitride finish, 1:16 twist, 5/8x24 thread pitch
• Pershing 5/8x24 steel flash can, Type III hardcoat anodized
• 6061 pistol caliber billet upper receiver, 6061-T6 aluminum, Type 3 Class 2 hardcoat anodized
• 4.2-inch freefloat M-Lok handguard, 7075-T6 aluminum, black
• PCC AR bolt assembly, 10mm, 9310 alloy steel, nitride finish
• Mil-Spec AR-15 M4 charging handle
• Mil-Spec heavy-duty 6-position buffer tube, aluminum, black
• 8 oz buffer
• SB Tactical SBA3 adjustable pistol stabilizing brace

Perfect For

• Builders sourcing a complete 10mm AR-15 pistol kit and pairing it with their own lower receiver
• Shooters building a compact 10mm pistol platform with an SB Tactical SBA3 brace already included
• AR-15 builders who want a 5.5-inch 10mm kit with the Pershing flash can and PCC bolt assembly covered in one package

Barrel and Muzzle Device

The 5.5-inch barrel is chambered in 10mm and constructed from 4150 CrMoV steel with a black nitride finish. The twist rate is 1:16 and the thread pitch is 5/8x24, which matches the included Pershing steel flash can in Type III hardcoat anodized finish. At 5.5 inches this barrel keeps the overall platform compact while covering the front end from muzzle device to upper receiver.

Upper Receiver and Handguard

The upper receiver is a 6061 pistol caliber billet design in 6061-T6 aluminum with a Type 3 Class 2 hardcoat anodized finish. The 4.2-inch freefloat M-Lok handguard is 7075-T6 aluminum in black, providing M-Lok attachment points along the rail body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-15 platform.

PCC Bolt Assembly and Charging Handle

The PCC AR bolt assembly is spec-matched to 10mm and constructed from 9310 alloy steel with a nitride finish. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set. These two parts cover the upper internal components beyond the barrel and handguard.

Buffer System and Brace

The buffer system in this kit includes a Mil-Spec heavy-duty 6-position buffer tube in aluminum, an 8 oz buffer, a recoil spring, an end plate, and a castle nut. The SB Tactical SBA3 adjustable pistol stabilizing brace rounds out the kit, providing an adjustable rear interface for the pistol platform.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.