Davidson Defense Hard Count w/SBA3 Brace 5-inch 1:10 9MM AR-9 Freefloat M-Lok Handguard Pistol Full Build Kit

Hard Count SBA3 Brace 5-inch 1:10 9mm AR-9 Freefloat M-LOK Pistol Full Build Kit

The Hard Count is a 9mm AR-9 Full Build Kit built around a compact 5-inch direct blowback platform. The kit centers on a 5-inch slim profile parkerized steel barrel with a 1:10 twist rate and 1/2x36 thread pitch, paired with a black A2 birdcage flash hider and a black crush washer. The 7075-T6 aluminum Type III hardcoat anodized black upper receiver features M4 feed ramps, an ejection port door assembly, and a forward assist assembly, paired with a 4.2-inch freefloat M-LOK handguard in 7075-T6 aluminum with a black finish, a full-length Picatinny top rail, and an integrated hand stop. A complete AR-9 blowback bolt carrier group in 8620 alloy steel with a nitride finish and an external extractor, compatible with Glock and Colt pattern magazines, and a Mil-Spec AR-15 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit with an A2 polymer grip, a heavy-duty Mil-Spec 6-position buffer tube, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring, a Mil-Spec M16 style receiver end plate, and a castle nut. The SB Tactical SBA3 adjustable pistol stabilizing brace in black reinforced polymer with a velcro retention strap, compatible with Mil-Spec carbine buffer tubes, is included. Lower receiver not included.

Key Features

• 5-inch slim profile parkerized steel barrel, 1:10 twist, 1/2x36 thread pitch, 9mm
• Direct blowback platform
• Black A2 birdcage flash hider, 1/2x36, black crush washer included
• 7075-T6 aluminum upper receiver, Type III hardcoat anodized black, M4 feed ramps, ejection port door assembly, forward assist assembly
• 4.2-inch freefloat M-LOK handguard, 7075-T6 aluminum, black, full-length Picatinny top rail, integrated hand stop
• Complete AR-9 blowback bolt carrier group, 8620 alloy steel, nitride finish, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec AR-15 charging handle
• Complete Mil-Spec AR-15 lower parts kit, A2 polymer grip included
• Heavy-duty Mil-Spec 6-position buffer tube
• AR-15 9mm carbine buffer
• Standard AR-15 carbine recoil spring
• Mil-Spec M16 style receiver end plate
• Castle nut included
• SB Tactical SBA3 adjustable pistol stabilizing brace, black reinforced polymer, velcro retention strap, Mil-Spec carbine buffer tube compatible

Perfect For

• AR-9 pistol builders sourcing a complete 9mm blowback full build kit with a 7075-T6 upper receiver, nitride AR-9 BCG compatible with both Glock and Colt pattern magazines, integrated hand stop handguard, and SBA3 adjustable brace already included, pairing it with their own lower receiver
• Shooters building a compact 5-inch 9mm direct blowback pistol platform who want the AR-9 BCG, charging handle, A2 flash hider, and SBA3 brace covered in one kit with a full-length Picatinny top rail handguard and Mil-Spec buffer tube
• AR-9 PCC pistol builders who want a complete blowback full build kit with Glock and Colt pattern magazine compatible BCG and a complete lower parts kit without sourcing components separately

Barrel and Muzzle Device

The 5-inch slim profile barrel is chambered in 9mm and constructed from steel with a parkerized finish. The twist rate is 1:10 and the thread pitch is 1/2x36, which matches the included black A2 birdcage flash hider. A black crush washer is included. The direct blowback platform design addresses the 9mm cartridge in an AR-9 pistol caliber build.

Upper Receiver and Handguard

The 7075-T6 aluminum upper receiver carries a Type III hardcoat anodized black finish with M4 feed ramps, an ejection port door assembly, and a forward assist assembly. The 4.2-inch freefloat M-LOK handguard is 7075-T6 aluminum in black with a full-length Picatinny top rail and an integrated hand stop, providing M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-9 pistol platform.

Bolt Carrier Group and Charging Handle

The complete AR-9 blowback bolt carrier group is 8620 alloy steel with a nitride finish and features an external extractor compatible with both Glock and Colt pattern magazines. A Mil-Spec AR-15 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 and includes an A2 polymer grip. The buffer system includes a heavy-duty Mil-Spec 6-position buffer tube, an AR-15 9mm carbine buffer, a standard AR-15 carbine recoil spring, a Mil-Spec M16 style receiver end plate, and a castle nut. The SB Tactical SBA3 adjustable pistol stabilizing brace in black reinforced polymer features a velcro retention strap and pairs with the included Mil-Spec carbine buffer tube, covering the rear brace interface for this AR-9 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. Verify compatibility with your specific 9mm lower receiver before use.