Trigger Jam

[Rock-climby-Dave]

OK, All of my friends i play with have the same problem, when using a JG M4 (any varient by the looks of things) on semi, the trigger occasionally jams open. acting as though safety has been engaged, firing a few rounds on full auto fixes this but i want to know is there is something i can do about it.

i dont want to be caught with a gun on safety when an enemy pops out from a tree basically.