AR15 pistol gas port modification info 10-1/4 barrel 3/32 drill bit

.093(3/32 drill) gas port enlargement. modified my Ar pistol to reliably feed low power inexpensive ammo. used the colt standard .093 size to great results. info on gas function of ar type rifles and pistols http://ar15barrels.com/prod/operation... model 1 sales pistol kits for home builders http://www.model1sales.com/index.cfm?...