five six Posted January 15, 2012 Share Posted January 15, 2012 (edited) Recently put together a Ma-Ten upper/lower with a fulton armory barrel and BCG (headspaced by them), and while adjusting my PRI gas block I noticed some weird brass markings. I am using some dynamit nobel 7.62 nato ammo. The case has what appears to be 2 sets of perforations(like a perforations on your common pay stub) running vertically starting from the neck of the case. It only happens after shot, not when I load a round and eject it without firing. If I can provide any more info please let me know. Edited January 15, 2012 by five six Quote Link to comment Share on other sites More sharing options...
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