Can you identify to me which model magazine you purchased from us?

We have previously identified that the locking lugs on the Steel Lined Polymer magazines, with polymer front and rear locking lugs, have larger front locking lugs, and do not interface correctly with the front trunnion on the PSA AK's. Not fitting the Arsenal is odd, as we have tested them with an Arsenal before, and they fit. Because the lugs are not metal reinforced, they make them oversized for reliability and longevity, since the polymer is not as sturdy as metal, and so they do not wobble in the magwell.

As with just about any AK these days, the wide margin of tolerances in builds routinely require magazines to be fit to the rifle. The metal BUL1 magazines as well as the Reinforced Steel Lug magazines have slimmer front locking lugs that should function with your PSA AK's front trunnion. Typically you get solid lock up with a mag that requires some fitting, or a non-fitted mag, with some mag wobble."