Elite Tactical Systems For Glock 21 30 41 45 ACP Magazine - 30 Round (Clear Polymer)

ETS produces this extended capacity 45 ACP magazine for your Glock pistols, made of a tough polymer resistant to shattering, warping, or cracking. The transparent material helps shooters to quickly see excactly how full or empty the magazine is. Their lightweight polymer mags are a great way to stock up on range magazines to pair up with your factory Glock mags. Elite Tactical Systems tests their internal springs with full loads, left for some time, to ensure that the spring will not lose tension and will still feed. The baseplates on these magazines are intended to aid in simple disassembly and cleaning, in addition to providing an easy way to pull mags out of mag pouches. 

These extended capacity aftermarket ETS mags should still function in your Glock like the factory mags do, locking the slide back after the last round, and dropping free when ejected.