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Rock River Arms 18 Inch Fluted – YHM 5320 MR7 Rail

$625.00
SKU: 
5140

The Rock River Arms 18 Inch Fluted – YHM 5320 MR7 Rail upper features a Rock River Arms 18 inch, fluted, chrome moly barrel, chambered in 5.56 NATO with a 1:9 twist, mid length gas system, and a 1/2-28 threaded muzzle. Built on a Rock River Arms flat top receiver with a YHM 5320 MR7 M-LOK rail and an A2 flash hider.

These are assembled and test fired by PK Firearms.

Complete with M16 bolt carrier group and forged charging handle.

FOR MORE INFORMATION ABOUT PK FIREARMS CUSTOM UPPERS PLEASE CLICK HERE