Apologies for the slight thread derailment, but have others reported issues with these mags locking back on Stag 10s? I thought it was just my gun.
If you search for a CGN thread on the XCR .308 10-round mags not locking back you will find a guide to filing the magazine: you can do the same file job on the Magpul ones and achieve the exact same result.
Check my "Started Threads" for Equipment Exchange ads: https://www.canadiangunnutz.com/forum/member.php/76158-Aniest