I have 3 Glock 21 magazines for sale. This is the 13 round, .45 ACP magazine for the Glock 21 and 21SF. It will also function in a Glock 30 or 30SF but will not sit flush with the receiver. I do not know if they are generation 4 or not. I bought them for my G21 gen 4, but because I am not left handed I don't remember which ones I purchased. They do appear to be the same ones in the generation 4 box.
$20.00 each shipped.
Email: pastor@fbcirving.com