Some times the charging handle won't fully chamber a rnd, sometimes I have to manually push the handle forward. This happens mostly on the first rnd, when I haul the charging handle all the way back and let it go , some times it'll happen halfway through a mag. Kinda like , either the cartridge is a little to big or the spring on the charging handle is too weak. It has about a 1000 rnds through it so far. Any ideas what could be wrong?


















































