Set of 3 shims for the M14/M1A gas system. Consists of .005, .010
and .020 stainless steel precision shims. By using these in
combination, you can cover a complete rotation of the gas cylinder lock
in .005 (about 1/6 turn) increments. USGI gas cylinder/cylinder
lock/front band combos usually shim tight at .020-.025. These mount
between the barrel shoulder and the gas cylinder. 300 Series Stainless
Steel.
