Works fine but a little tight - Ammunition Storage Components AR-15 6.5 Grendel Stainless Steel 5 Round Rifle Magazine

Mag works fine, no issues with feed. It’s a little on the tight side barely can get the fifth round in it, but I can fix that. Size wise, it is the same size as my 10 round mags, so I had to engrave it to keep from using the wrong one and being illegal while hunting.