The gas block is a set screw with a pre drilled notch in barrel. Both barrel and gas block are wilson combat and it's not adjustable

I've put together a 204 ruger ar-15. It's got an 18 inch Wilson combat barrel with match gas block and rifle length gas tube. The lower has a rifle length a2 style stock. The rifle will not cycle the next round and will not lock back after last round. Its throwing brass at about 3 to 4 o'clock. I've...

I recently bought a ruger American predator 204 ruger. My question is mine takes ar-15 magazines rugers web site says it should take ai mags. Is this going to be an issue for it? It feeds good most of the time if I run the bolt fairly fast but if I go slow it sometimes won't chamber unless I tip the...