Rock River Arms
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Rra Cmp Coyote Car A4 Upr 300blk 16
Rock River Arms
$726.78Rock River Arms A4 Coyote Carbine upper comes chambered in .300 AAC / Blackout with a 16" chrome moly 1/8twist barrel. Additionally this upper includes a RRA 12.5" M-Lok compatible lightweight free...$726.78 -
Rra Cmplt Car A4 Upr 350lgd 16" 10rd
Rock River Arms
$654.76Rock River Arms A4 Carbine upper comes chambered in .350 Legend with a 16" chrome moly 1/16 twist barrel. Additionally this upper includes a RRA 13" M-Lok compatible lightweight free float rail and a...$654.76 -
Rra Cmplt Mid A4 Upr 450bm 16" 5rd
Rock River Arms
$667.85Rock 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...$667.85 -
Rra Cmptl Rrage 3g Upr 5.56nato 16
Rock River Arms
$477.97Rock River Arms RRAGE 3G A4 carbine upper comes chambered in 5.56mm NATO. This extruded aluminum upper receiver comes with a port door and no forward assist. Additionally, this upper is equipped with...$477.97