AR-15 300 AAC blackout 16" M4 rifle kit w/ 15" slim rail. AR-15 Mil Spec Lower Parts Kit. This rifle kit contains all components to complete your AR-15 Rifle. The rifle kit comes WITHOUT 80% lower receiver. All options and modifications to your kit are available on top of this page. All components are Mil Spec and made in the USA. Our handguards are free float.
Barrel: 16” Contour, Nitride Finish
Chamber: .300 AAC
Twist: 1 in 8”
.750” Gas Block Diameter
Pistol Gas Tube*
M4 flat top upper receiver
Ejection Port Cover
A2-style Flash Hider
15" Slim Keymod Rail
M16 Bolt Carrier Group
AR-15 Charging Handle
M4 6-position Black Stock
Barrel: 16” Contour Barrel with 1:8 twist (Mag Phos), .300 blackout caliber, nitride finish with a pistol gas system.* Barrel is finished off with an anodized rifle length keymod rail and A2 style flash hider.
Upper: 7075-T6 M4 upper is flat top, precision machined and hard coat anodized. These uppers are made for us in the USA by a mil-spec manufacturer (DPMS style).
Bolt Carrier Group: M-16 5.56/.223 complete bolt carrier assembly, chrome lined, made from 8620 steel, Bolt is made from 9310 steel and stalked per mil spec. MPI Tested. Comes complete with cam pin, firing pin and firing pin retainer.
Lower Build Kit: Classic AR-15 lower parts kit, Mil-Spec. Includes everything you need to turn your 80% stripped lower into a complete lower.
Stock: M4 Carbine 6-position black stock, Mil-Spec. Completed with buffer tube assembly and spring.
Please Note: Comes unassembled.