comn-cents
New member
I just bought an older Ruger p90 with the original 7rd mags. The gun shot like I expected, accurately and 100% reliable. I bought a couple of factory 8rd mags. They just won't work, slide won't lock back on last round. One of them would only load 4 rounds, it seems very unRuger like. So I cleaned the mags and I can get 8rds in both now but still won't lock back on last round. Anyone else have problems matting old gun with new mags?