I just picked up my new Ruger PC Carbine (Model# 19116 as legal in California) from my local FFL dealer. It comes with the Ruger SR-Series Magazine-Well pre-installed. I noticed the Ruger factory magazine sits quite loose in the Well. As a matter of fact, I can pull out the magazine without...

Hello, When I removed the SR9 magazine assembly for the first time a tiny cap fell out. Does anyone know what this part is and how it is replaced? Thanks!