SuMoSam
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F.A.B. Defense M4 Aluminum Quad Rail + Eotech 512
SuMoSam replied to CANCOLTM422's topic in Colt Umarex Mods and Upgrades
Can we use any Mil-Spec quad rail on Colt M4 Carbine (non-OPS) delta systems? I'm looking into replacing the forearm grip as well, but didn't want to buy a system just to find out they don't fit on the Colt.