hey folks. I bought a ar-10 by pws last march and I just got to shoot it yesterday. but I am having a problem this is a new gun. for rounds into the magazine. pull the charging handle back and let it go . put on fire, pull the trigger and gun does not fire. the bolt carrier will not go far enough to let firing pin strike the primer . these are reloads but does the same on factory loads . cycled gun with out a round and made a mark on receiver with a pen cycled a live round and you can see by the pen mark made bolt carrier does not go far enough to let firing pin strike the primer . any help would be appreciated . a 2 thousand gun should shoot all the time .oh at one point I got 10 reloads to shoot I think once the gun heats up and the metal expands the gun will cycle because when it cooled down it stopped working again . thanks for any help bob.