Davidson Defense Spellcaster 7.5" 45ACP AR-45 Pistol Build Kit, M-Lok Handguard, 1:16, w/ SBA3 Brace

Spellcaster Blem w/SBA3 Brace 7.5-inch .45 ACP AR-45 Full Build Kit

The Spellcaster w/SBA3 Brace is a 7.5-inch .45 ACP AR-45 Full Build Kit built around a Bear Creek Arsenal barrel, a 6061 aluminum "Vertex" enhanced pistol-caliber AR-15 billet upper receiver, and an SB Tactical SBA3 adjustable pistol stabilizing brace. The kit includes a Blem free-float M-LOK handguard, reflecting a cosmetic condition on that component rather than the complete kit. A PCC bolt assembly, Mil-Spec charging handle, complete Lower Parts Kit, and carbine buffer-system components round out the build. The lower receiver is not included, leaving the buyer to select and supply that component separately.

Key Features

• 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 "Vertex" enhanced pistol-caliber AR-15 billet upper receiver
• Blem 7-inch free-float M-LOK handguard
• Full-length Picatinny top rail with integrated QD mounts
• AR-15 .45 ACP birdcage muzzle brake
• SB Tactical SBA3 adjustable pistol stabilizing brace included
• Complete Mil-Spec Lower Parts Kit and carbine buffer-system components included
• Lower receiver is not included.

Barrel and Muzzle Device

The Spellcaster'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 "Vertex" enhanced pistol-caliber AR-15 billet unit, giving the Spellcaster its upper-side structural core. It's paired with a Blem free-float M-LOK handguard, 7 inches long, with a full-length Picatinny top rail and integrated QD mounts alongside its M-LOK accessory slots. This handguard does not include anti-rotation tabs. Both the receiver and handguard are matched to the barrel's dimensions and thread specifications supplied with this kit.

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 Spellcaster 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 AR-15 9mm carbine buffer, 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.

Stabilizing Brace

The Spellcaster w/SBA3 Brace includes an SB Tactical SBA3 adjustable pistol stabilizing brace finished in black. The brace is built for Mil-Spec carbine buffer tubes, matching the buffer tube supplied with this kit. It ships as part of this kit's furniture, mounted on the six-position adjustable buffer tube rather than left for the buyer to source separately. Its inclusion rounds out the buffer-system components covered above.

Follow all manufacturer instructions and safe handling practices.

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

Lower receiver is not included.