1.) I have a Colt M4 Model 6920, and I have a tango down BGV MK46 Front Grip on my M73 picatinny rail Forend but the Front Grip "handle" moves slightly. Does anyone recommend a front grip that locks down and won't move at all? Is there a "best" one out there?
2.) Is there anyway to make my M4 fully automatic?




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