Mission first tactical 10 rd extreme duty polymer 7.62 x 51 nato .308 - Mission First Tactical 10 RD Extreme Duty Polymer 7.62 x 51 NATO .308 Winchester AR10 SR25/M110 Magazine

Very nice mag in fde, well built but the mag catch grove is out of spec. and will not lock in, it falls right out. The mag itself is a snug fit in a Aero 7.62 lower. It looks like a little dremel work can adjust the spec on the mag catch grove but you don't want to have to modify every mag you buy for your AR10 or make anything gun specific. Has to be universal fit. If this was a last option maybe but the pmag is a perfect universal fitting mag. I Spent 40.00 on two of these mags and then had to spend 40.00 more on pmags. Don't waste your money on these until the manufacturer diles it in.