Davidson Defense Broadhead SBR Ready 7.5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Full Build Kit

Broadhead SBR Ready 7.5-inch .45 ACP AR-45 Full Build Kit

The Broadhead SBR Ready Full Build Kit combines a 7.5-inch .45 ACP Bear Creek Arsenal barrel group with a 6061 aluminum billet pistol-caliber upper receiver and an ACE-20 Series free-float M-LOK handguard. A PCC bolt assembly, Mil-Spec charging handle, complete Lower Parts Kit, and carbine buffer-system components are all included with the kit. The lower receiver is not included, and this SBR Ready version ships without a brace. The build runs on a direct blowback system, requiring no gas block or gas tube.

Key Features

• SBR Ready design
• 7.5-inch .45 ACP Bear Creek Arsenal barrel, 1:16 twist
• Direct blowback operating system, no gas block or gas tube required
• 6061 aluminum billet pistol-caliber AR-15 upper receiver
• ACE-20 Series 7-inch free-float M-LOK handguard with Picatinny top rail
• AR-15 .45 ACP birdcage muzzle brake
• Complete Mil-Spec Lower Parts Kit and carbine buffer-system components included
• Lower receiver is not included.

Barrel and Muzzle Device

The Broadhead's barrel is a Bear Creek Arsenal 7.5-inch .45 ACP barrel built from 4150 chrome moly vanadium steel with a Parkerized finish and an M4 contour. It carries a 1:16 twist rate, a .578x28 muzzle thread, and a .750-inch gas block journal, and it operates on a direct blowback system that requires no gas block or gas tube. An AR-15 .45 ACP birdcage muzzle brake finished in manganese phosphate is installed at the muzzle using the matching .578x28 thread pattern, secured with the included 5/8-inch black crush washer. Together these components define the barrel group that anchors the rest of the build.

Upper Receiver and Handguard

The upper receiver is a 6061 aluminum billet unit built specifically for pistol-caliber AR-15 platforms, giving the Broadhead its upper-side structural foundation. It's paired with an ACE-20 Series free-float M-LOK handguard, 7 inches long, featuring M-LOK accessory slots and a Picatinny top rail. Both the receiver and handguard are matched to the barrel's dimensions and thread specifications supplied with this kit. They form the defining upper-side identity of this build.

Bolt Assembly and Charging Handle

A PCC AR bolt assembly built for .45 ACP is included with the kit, matched to the pistol-caliber upper receiver and barrel. A Mil-Spec AR-15 M4 charging handle is included alongside it to complete the upper-side operating components. Both parts are sized and configured specifically for this .45 ACP pistol-caliber build. Together they round out the components needed to complete the upper assembly.

Lower Parts Kit and Buffer System

The Broadhead includes a complete Mil-Spec AR-15 Lower Parts Kit, giving the buyer the fire-control and lower-control components needed once a lower receiver is supplied. The buffer system consists of a Mil-Spec heavy-duty six-position adjustable carbine buffer tube, an 8-ounce 9mm carbine buffer finished in black, a standard USA-made AR-15 carbine recoil spring, a standard AR-15 carbine castle nut, and a Mil-Spec AR-15/M16 receiver end plate. These components support the carbine buffer configuration used in this build. All of these lower-side parts are included with the kit, while the lower receiver itself remains excluded.

SBR Ready

This Broadhead kit is configured as SBR Ready, which means it ships without a brace so the buyer can select their own final setup. The included component list above reflects exactly what ships with this kit, and it should be reviewed as supplied when planning the completed build. The lower receiver and any furniture selection remain the buyer's responsibility, separate from what's included here. The SBR Ready designation applies specifically to this configuration of the Broadhead.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.

Lower receiver is not included.

Ships without a brace.

Do not attach a stock unless the resulting configuration complies with all applicable federal, state, and local laws.