when was the last time you cleaned your magazines?that's what i thought. i generally carry my xd-9 sub for my off duty carry. i hadn't shot it in several months, so i ran a few hundred thru it the other day. 1 mag consistently didn't feed the last round, and the other mag wouldn't put the pistol into slide-lock. i've never had any problems with this weapon, or these mags. she was clean and lubed, and the internals of the weapon all look good.
+1. If you let any weapon sit that long, you are best to take apart the mags and firearm and give them a good cleaning. Make sure you have so lube on the slide rails and that you don't have any lint, grit, etc. affecting the mag follower.when was the last time you cleaned your magazines?