Well i got the 10 round mag and was impressed with the fit in my ARs and how well everything looked,Today i went out and put 200 rounds thru the mag and was somewhat dissappointed,I had many failure to feed with the mag as if i had a round not cycle i would reload all the rounds in a Colt 20 rounder and not have a problem,This happen about 1-2 times per full load of the 10 round mag,And would never lock back the bolt on the last shot,So all in all i got a ok mag but was hoping to have a better product for hunting but not gonna worry about it and try a few others as i got time until November when i will really have to have 2-3 ,10 round mags i need to rely on.