AR15 Pistol build kit includes parts necessary to complete your 80 percent AR15 lower [not included].  10.5″ 4150V Chrome Moly vanadium steel, nitride treated barrel chambered in 5.56 NATO with a 1 in 7″ twist. Carbine-length gas barrel is finished off with a 12″ Slant End M-Lok Rail, a low profile gas block and Fluted Flash Can. Includes charging-handle, bolt carrier group, lower parts kit, and SBA3 pistol brace.

*Not for sale to residents of the states of New York or New Jersey.

Out of stock

SKU: AR15-556-PISTOL-BUILDKIT-10.5-877 Categories: , , , , , ,



Material | 4150 CMV

Caliber | 5.56 NATO

Twist | 1:7

Length | 10.5″

Gas System |  Carbine

Finish | Nitride

Thread | 1/2-28

Extension | M4

Upper Receiver

7075-T6 Forged Aluminum

Type III Hard Coat Anodizing

Assembled with Forward Assist and Dust Cover

M4 Feed Ramps


Lightweight Aluminum

M-lok Rail


Bolt Carrier Group

Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside

Lower Parts Kit

Lower build kit with everything you need to assemble your AR-15 lower into a pistol. Features Enhanced Polished Trigger (EPT)


Safety Selector | Detent | Spring

Magazine Catch | Button | Spring

Bolt Catch |  Buffer | Spring

Bolt Catch Buffer

Takedown | Pivot Pins | Springs [2] | Detents [2]

Buffer Retainer Pin | Spring

Magpul MOE Grip | Trigger guard 

Buffer Tube

7075 mil-spec carbine receiver extension

5-position adjustable

Castle Nut

Latch Plate

Standard Carbine Buffer

Carbine Length Spring

Pistol Brace

The SBA3™ is 5-position adjustable, dramatically enhances versatility, and features a minimalist design with an integral, ambidextrous QD sling socket

Flash Can

Solid 6061 Aluminum device designed to direct gasses and noise forward away from the shooter and enhance the weapon’s appearance

Additional information

Weight 99.2 oz
Dimensions 32 × 8 × 4 in