Newer M1 Garand rifle collectors may not be aware that the U.S. Rifle, Cal. .30 M1 with which we are all familiar featured a very different type of gas system when it was adopted in 1936.  The collector term standardized by the Garand Collectors Association (GCA) in 1993 for the first type of gas system was Gas Trap that utilized a false muzzle to deflect or “trap” the gas into the gas cylinder.  The early barrel was threaded at the muzzle and the gas cylinder screwed onto it.  The gas plug slipped down into the front of the cylinder and was held in place by a screw.  The barrel had…