Davidson Defense Beehive w/SBA5 Brace 7.5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Full Build Kit

Beehive w/SBA5 Brace 7.5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Full Build Kit

This is a complete AR-45 pistol build kit with everything you need except the lower receiver. The 7.5-inch 4150 CrMoV barrel fires .45 ACP with a 1:16 twist rate optimized for standard and subsonic ammunition. The direct blowback operating system means no gas block or gas tube required, which simplifies the design and reduces moving parts. You get a Vertex billet upper receiver, free-float M-LOK handguard, SBA5 stabilizing brace, complete lower parts kit, buffer system components, and all hardware needed for assembly.

Key Features

• 7.5-inch 4150 CrMoV barrel with 1:16 twist, parkerized finish, optimized for .45 ACP
• Vertex enhanced pistol-caliber billet upper receiver with tight tolerances
• Free-float M-LOK handguard with suppressor-ready design
• SBA5 stabilizing brace on six-position adjustable buffer tube
• PCC bolt assembly for .45 ACP with nitride-finished carrier
• Complete lower parts kit with mil-spec components
• AR-15 birdcage muzzle brake with crush washer
• All hardware, springs, and buffer components included

Perfect For

• Shooters building a compact .45 ACP pistol platform
• Those wanting direct blowback simplicity without gas system tuning
• Suppressor-ready builds with M-LOK accessory mounting
• Pistol-caliber carbine enthusiasts on the AR platform
• Builders who want a complete upper and lower kit solution

Direct Blowback Simplicity

The direct blowback system eliminates the gas block and gas tube entirely. This means fewer components to maintain, easier cleaning, and less complexity during assembly. You're relying on the bolt carrier's mass and spring tension to cycle the action, which works exceptionally well in .45 ACP where the round's power is sufficient for reliable operation. The trade-off is slightly more felt recoil compared to a tuned gas system, but the design is proven for pistol-caliber platforms.

Suppressor-Ready Design

The M-LOK handguard is engineered with suppressor mounting in mind. The 7-inch free-float design keeps the barrel unburdened for accuracy, and the suppressor-ready muzzle device thread pitch matches standard .45 ACP suppressors. The birdcage brake is functional on its own, but the platform is built to accept a suppressor without modification. The handguard's internal diameter and design ensure clearance for suppressed operation.

Complete Component Set

This kit includes the upper assembly with barrel, handguard, and muzzle device. You also get the bolt carrier group, charging handle, complete lower parts kit, buffer tube, buffer, recoil spring, castle nut, end plate, and SBA5 brace. The only component you need to source separately is the serialized lower receiver. Everything else arrives ready for assembly without additional purchases.

SBA5 Stabilizing Brace Configuration

The SBA5 brace mounts to the six-position adjustable mil-spec buffer tube, giving you length-of-pull options for different shooting positions and preferences. The brace is compatible with standard AR-15 carbine buffer tubes and provides a stable platform for one-handed or two-handed operation. The brace design allows for customization of fit without tools.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify compatibility with your serialized lower receiver before assembly.