They were hit and miss for me. Worked excellent in my stock upper but the Lage one would give me issues feeding. Spent a lot of time and ammo tweaking them and just gave up and found a bunch of NOS GG mags and called it a day. I think I bought ten of them.
Put them in your shopping cart and wait...they'll send you a discount code. Did it last year and got them for 20-24 a piece...don't remember the number
I’ve had a bad experience with keepshooting (M1/M2 carbine magazines) and will not buy from them again.
That being said, I purchased prolly 20 GG mags from them years ago for a really good price.
The mags are decent. A few of them didn’t work the best but the majority of them are good to go. If you can find USGI mags for a fair price, I would buy them.
I bought two after market GG mags and was not happy I shorted them to 10 rounds and they both have worked very well.
Some of the military magazines the Parkerizing in side the magazine is quite rough and pushing a ball of steel wool back and forth through them work to smooth out the roughness.
I thought of this after seeing how smooth the blued after market mags where .