I have a 16 upper 5.56...I have done many of these rifles before...this time I had a PRI lo pro gas block that was loose when the tube went in..I am used to "hammering" them in..this one just slipped in...now the rifle is together, and is shooting great with all kinds of ammo, underpowered and m193...it is ejecting perfect 3 to 4 oclock..should I leave it alone?(or get another gas block and tube tighter fit?) I have about 200 rnds through it and really was flawless...
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