I have a question about my new HK USP 45

[jojo760]

Years ago, I bought an HK USP 40. When using that handgun, if I slammed in the magazine hard enough, the gun would bring the slide forward and chamber the first round. I believe this is where the universal self loading pistol name was born. I sold that gun about 5 years ago and today picked up my second HK USP, this time a 45 cal. When I slam in the mag this time, with a snap cap, nothing happens with the slide. The safety and decocker behave the way I remember. The main difference with this one, is there is some kind of key that comes with the gun for some internal lock that wasn't on previous models. Is the something wrong with my handgun, or did HK change the design?

[SIGtrarian]

Years ago, I bought an HK USP 40. When using that handgun, if I slammed in the magazine hard enough, the gun would bring the slide forward and chamber the first round. I believe this is where the universal self loading pistol name was born. I sold that gun about 5 years ago and today picked up my second HK USP, this time a 45 cal. When I slam in the mag this time, with a snap cap, nothing happens with the slide. The safety and decocker behave the way I remember. The main difference with this one, is there is some kind of key that comes with the gun for some internal lock that wasn't on previous models. Is the something wrong with my handgun, or did HK change the design?All semi-automatics are considered self loading, it has nothing to do with slamming the magazine. A semi-auto reloads (or self loads) a round into the chamber after being fired. I have Glocks that will do this if slammed hard enough. There is nothing wrong with your firearm.

[Big Bore]

HK did change the angle on the slide release but it will still do it if you slam it home hard enough. It just takes a little more to do it now than it use to.

That key is for the lanyard loop lock and has nothing to do with the slide release mechanism. Just turn it off (or leave it off) and forget about it. There is absolutely no good reason to remove it because it cannot get turned on accidentally and it does not interfere with trigger pull or anything else.

[Slingblade2006]

Run two mags through it and get it warm. It will "slamload" after that.