Davidson Defense Shorty 5 5-inch 1:16 45ACP AR-45 Freefloat M-Lok Handguard Pistol Complete Upper Build

Shorty 5 5 Inch AR-45 Complete Upper .45 ACP Freefloat MLOK

The Shorty 5 AR-45 Complete Upper is a fully equipped upper assembly built around a 5 inch .45 ACP barrel made from 4150 CrMoV steel with a Parkerized finish and a slim profile, carrying a 1:16 twist rate. The upper receiver is a billet design machined from 6061 aluminum in black, built for pistol caliber platforms, paired with a 4 inch MLOK freefloat handguard featuring a full length Picatinny top rail. This upper includes a complete bolt assembly and charging handle, giving builders the front end and cycling components needed for the upper side of a .45 ACP pistol build.

Key Features

• 5 inch .45 ACP barrel, 4150 CrMoV steel, Parkerized finish, slim profile
• 1:16 twist rate, 37/64x28 thread pitch
• Billet pistol caliber upper receiver, 6061 aluminum, black
• 4 inch MLOK freefloat handguard, black
• Full length Picatinny top rail
• No anti-rotation tabs
• AR-15 .45 ACP birdcage muzzle brake, manganese phosphate finish
• 5/8 inch black crush washer included
• PCC bolt assembly for .45 ACP
• Mil-Spec quality M4 charging handle
• No gas tube or gas block required

Perfect For

• Builders pairing a complete upper with an existing lower receiver
• Shooters wanting a compact .45 ACP pistol length platform with a freefloat MLOK handguard
• Builders who want the bolt assembly and charging handle covered in one package

Barrel and Operation

This upper uses a 5 inch barrel made from 4150 CrMoV steel with a Parkerized finish and a slim profile. The 1:16 twist rate is suited to .45 ACP bullet weights, and the 37/64x28 thread pitch matches the included birdcage muzzle brake. This build operates on a blowback system and does not require a gas tube or gas block. The barrel and related components make up the front end of this complete upper.

Upper Receiver and Handguard

The upper receiver is a billet design machined from 6061 aluminum in black, built for pistol caliber platforms. A 4 inch MLOK freefloat handguard finished in black surrounds the barrel without contacting it, featuring a full length Picatinny top rail and no anti-rotation tabs, giving this upper a compact exterior forend built for a short pistol length platform.

Bolt Assembly and Charging Handle

The included bolt assembly is built for .45 ACP. A Mil-Spec quality M4 charging handle completes the cycling components of this upper, rounding out the included hardware. A 5/8 inch black crush washer is included as part of the muzzle end hardware.

Follow safe handling and manufacturer instructions.

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

BCG and charging handle are included with this complete upper.

Component specifications are subject to the details provided in this listing.