I have 4 mags for P90 45acp.These are 10 rounders. These are ProMags and function excellent. I also have a Fobus Roto Paddle Holster for the P90. I would like 45.00 shipped for all.
I have them on mine and they work fine without the pin. Have put about 400 rnds through it with no problem. I did use some blue loctite on the front sight to be sure.