The ar gas operating system designed by stoner used a variation of the direct gas impingement system best known in the jungmans mag 42 b. Suppressors often caused over gassing hence the use of ajustable gas blocks.
Irrespective the system was intrinsically dirtier than a gas piston actuated operating system.
Thankfully the anguish of having to clean all your dirty brass has being removed by our caring government and we are all safer as a result.
Bookmarks