UPPERS

MSTN Precision 18" SPR "Mod 2" Upper Receiver
MSTN 10.5" Short Barrel Rifle "SBR" Upper Receiver

MSTN Precision 16" Recce Upper Receiver
MSTN 11.5" Short Barrel Rifle "SBR" Upper Receiver

MSTN Standard Hard Use Upper Receiver
MSTN 12.5" Short Barrel Rifle "SBR" Upper Receiver