Davidson Defense Left Hook SBR Ready 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Full Build Kit

Left Hook SBR Ready 10.5-Inch 1:8 5.56 NATO AR-15 Left-Hand Drop-In Quad-Rail Handguard Pistol Full Build Kit

The Left Hook SBR Ready Full Build Kit is built around a 10.5-inch 5.56 NATO Bear Creek Arsenal barrel with a carbine-length gas system and a fixed M4-style front sight base, paired with a left-hand Black Diamond Series billet upper receiver and a matched left-handed Davidson Defense bolt carrier group. Lower receiver is not included, and this kit ships without a brace.

Key Features

• SBR Ready design
• 10.5-inch Bear Creek Arsenal barrel, M4 profile, 1:8 twist, Parkerized finish
• Carbine-length gas system with fixed M4-style front sight base
• Left-handed slick-side billet upper receiver, Black Diamond Series, black
• 7-inch M4 carbine-length drop-in quad rail handguard, Picatinny rail system
• A2 Birdcage flash hider included
• Davidson Defense premium left-handed M16/AR-15 BCG, Nitride finish, and mil-spec quality M4 charging handle included
• Complete mil-spec AR-15 Lower Parts Kit and buffer-system components included
• Lower receiver is not included.

Barrel and Gas System

The 10.5-inch Bear Creek Arsenal barrel is built in an M4 profile from 4150 chrome moly vanadium steel with a Parkerized finish and a 1:8 twist rate suited to 5.56 NATO and .223 Remington. It runs a carbine-length gas system through a stainless steel gas tube, and it's built with a fixed M4-style front sight base that includes a front sling attachment point. The muzzle carries an A2 Birdcage flash hider.

Upper Receiver and Handguard

The upper receiver is a left-handed, slick-side billet unit from the Black Diamond Series, finished in black, and it includes the ejection port door assembly with rod and spring. It's paired with a 7-inch M4 carbine-length drop-in handguard built on a quad-rail Picatinny system, finished in black.

Bolt Carrier Group and Charging Handle

A Davidson Defense premium left-handed M16/AR-15 bolt carrier group is included, finished in Nitride to match the upper receiver's left-side charging orientation, along with a mil-spec quality AR-15 M4 charging handle.

Lower Parts Kit and Buffer System

The kit includes a complete mil-spec AR-15 Lower Parts Kit, along with the carbine castle nut, mil-spec receiver end plate, and a USA-made standard AR-15 carbine recoil spring. The buffer system pairs a 3-ounce standard AR-15 carbine recoil buffer with a mil-spec heavy-duty six-position carbine buffer tube.

SBR Ready

This kit ships without a brace. It's built for customers who plan to finish their configuration on their own terms, so review the included component list above as supplied. This description does not represent a finished or ready-to-use firearm.

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.