Rock River Arms brings their A4 mid-length upper to the table in .450 Bushmaster, featuring a 16″ chrome moly barrel with 1/24 twist rate. The upper is outfitted with a 13″ RRA M-Lok compatible lightweight free float rail and topped with an RRA Operator Brake featuring 5/8-32 thread. This complete upper ships with a bolt carrier group, charging handle assembly, and 5-round capacity magazine.
AR Upper Parts
Rock River Arms Tactical Carbine Mid A4 450 Bushmaster 16 Inch
$751.00
Rock River Arms A4 mid-length upper in .450 Bushmaster delivers serious stopping power with a 16″ chrome moly barrel and includes complete bolt carrier group and charging handle assembly.
Availability: Only 1 left in stock
Rock River Arms
| Weight | 2 lbs |
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| Dimensions | 12 × 6 × 4 in |
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