I found one of these at an Army&Navy store for $10 bucks. He even had USGI mags for $10 bucks, but im broke and could'nt buy more.
I had never seen one of these Ramline AR-15 mags before. It looks like it fits the Ruger Mini-14 also, but i have no way of testing that. The mag fit very tightly in the well and the bolt would not lock by hand.-but will when fireing the last shot..Odd. No problems with feeding. Ran fine, but i noticed very small cracks at the backside of the mag where it fits in the magwell. Dont go prone hard with these i suppose. Not a problem at the moment, but past experince with .22lr Ramline mags is that it will likely break. Shame.
Another problem with the design is no clear way of fieldstripping the mag. If i rough handle it, im afraid i might break/crack the thing.
I like the idea of a C-thru mag, but i guess that will have to be left to the AUG, HK, and Sig rifles.
CDNN has Eagle C-thru mags. Dont know how good they work, but they look kind'a weird. Anybody know how these are?