AR15 Rifle build kit includes complete upper receiver, bolt carrier group, charging handle, and complete lower parts kit; as pictured.  Not for sale in New York or New Jersey.

4 in stock



Material | 4150 CMV

Caliber | 300AAC Blackout

Twist | 1:7

Length | 8.5″

Gas System |  Pistol

Finish | Nitride

Thread | 5/8-24

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

7″ 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

Additional information

Weight 92.8 oz
Dimensions 32 × 8 × 4 in