ASC mags are hit or miss on quality. When I bought my first 6.5 Grendel AR-15 C Products was the only magazine available. I bought one five, one ten, three fifteen and one twenty five round mags. I later bought four twenty five round ASC mags after ASC absorbed C Products. I also purchased one AA marked ASC twenty five round magazine. I had to adjust the feed lip on one twenty five round ASC mag as it failed to feed from the non ejection port side. After tweaking the feed lip all these magazines function.
I always recommend people buy 6.5 Grendel magazines from vendors who will take returns of defective magazines. All the different brands of 6.5 Grendel mags have suffered from lemons hitting the market. I currently have thirty one 6.5 Grendel mags and besides the one ASC mag I tweaked the feed lip I had trouble with one twenty four round E-Lander which failed to feed. The welds on the spine were rough where the follower was dragging. A few passes with a flat file fixed that E-Lander mag.
Basically two magazines out of 31 which needed adjustment to make them work. I only have two C Products Defense Duramag magazines which are twenty round capacity. D&H sell a ten round magazine which I have never used. I have never tried the ten round polymer Amend2 magazine.
I always recommend people buy 6.5 Grendel magazines from vendors who will take returns of defective magazines. All the different brands of 6.5 Grendel mags have suffered from lemons hitting the market. I currently have thirty one 6.5 Grendel mags and besides the one ASC mag I tweaked the feed lip I had trouble with one twenty four round E-Lander which failed to feed. The welds on the spine were rough where the follower was dragging. A few passes with a flat file fixed that E-Lander mag.
Basically two magazines out of 31 which needed adjustment to make them work. I only have two C Products Defense Duramag magazines which are twenty round capacity. D&H sell a ten round magazine which I have never used. I have never tried the ten round polymer Amend2 magazine.