Rock River Arms Tactical Carbine, Complete Upper Receiver, 450 Bushmaster, 16 in Barrel, Mid-Length Gas System, RRA Operator Muzzle Brake, RRA 13 in Free Float M-LOK Handguard, Anodized Finish, Black,

Rock River Arms A4 mid-length upper comes chambered in .450 Bushmaster with a 16" chrome moly 1/24 twist barrel. Additionally this upper includes a RRA 13" M-Lok compatible lightweight free float rail and a RRA Operator Brake (5/8-32 thread). This is a complete upper with bolt carrier group" charging handle assembly and a 5 round magazine.

.450 Bushmaster

16 Inch Chrome Moly, 1:24 Twist

RRA Operator Brake, 5/8-32 Thread

Low Profile Gas Block, Mid-Length Gas System

RRA 13 Inch Extended Lightweight Free Float Rail

Bolt Carrier Group, Charging Handle Assembly

(1) Magazine, (5) Rounds

Accessories:	1 Mag
Barrel Length:	16"
Capacity:	5 Rounds
Finish:	Anodized
Fit:	AR-15
Caliber:	450 Bushmaster
Manufacturer:	Rock River Arms
Manufacturer part #:	450B0592
Model:	Tactical Carbine
Type:	Upper
Sub Category:	Complete Upper Receivers
Color:	Black