Davidson Defense Flowback 5.5-inch 1:16 10MM AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Davidson Defense Flowback 5.5-inch 10mm AR-15 Freefloat M-Lok Complete Upper

The Davidson Defense Flowback is a 10mm AR-15 Complete Upper built around a compact 5.5-inch platform. The kit centers on a 5.5-inch 10mm barrel in 4150 CrMoV steel with a nitride finish, 1:16 twist rate, and 5/8x24 thread pitch, paired with a Pershing 5/8x24 steel flash can. 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 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 component set.

Key Features

• 5.5-inch 10mm barrel, 4150 CrMoV steel, nitride finish, 1:16 twist, 5/8x24 thread pitch
• Pershing 5/8x24 steel flash can
• 6061 pistol caliber billet upper receiver, 6061-T6 aluminum, Type 3 Class 2 hardcoat anodized
• 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

Perfect For

• Builders sourcing a complete 10mm AR-15 upper ready to pair with their own lower receiver
• Shooters building a compact 10mm pistol platform who want the BCG and charging handle already included
• AR-15 builders who want a 5.5-inch 10mm upper with a matched bolt assembly covered in one complete upper

Barrel and Muzzle Device

The 5.5-inch barrel is chambered in 10mm and constructed from 4150 CrMoV steel with a nitride finish. The twist rate is 1:16 and the thread pitch is 5/8x24, which matches the included Pershing steel flash can. At 5.5 inches this barrel keeps the overall upper 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 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.