"Its a USP thing"

[Reheater]

Ok, so I cant be the only one that notices this. Ive got a USP .40 and I noticed this at first and thought it was a fluke, but. Anybody else noticed that when you seat a loaded mag with the slide back the slide just comes forward from the impact. Ive been training myself to expect the pistol to do that since Id rather not have to rack the slide and loose a round. Does anybody else do this or am I banking on something that might back fire later.

[bachchoy]

I wouldn't understand.

[FoxMustang]

Originally posted by Reheater
Anybody else noticed that when you seat a loaded mag with the slide back the slide just comes forward from the impact.
I've heard of this happening to some other folks, but I've never experienced it myself. I don't think it's a design feature.

[Jeff S.]

How hard are you seating the mag? From my experience with my HK USPc40, it doesn't take much force whatsoever to seat a mag with the slide back.

FWIW, I've never had this happen with my HK, but it has happened to me about 5 times with my G17 when I seat the mag a little to "energetically".

[Reheater]

Im not smashing the thing on the ground or anything, and Im not a huge guy. But when I seat the mag, and yeah Ive been around AR's alot so I do it the energetic way, the slide always comes forward to chamber the round. I asked the guys at the range (both USP packing hombre's) if this was normal and they said it happens to them. Im just trying to see if anybody else gets this.

[fnfalman]

This sort of thing happens to autopistols a lot. IF you force a mag home, it's a good chance that the slide hold-open device would lower and slam the slide home.

[obxemt]

I've never had it happen with any gun in combat courses or high stress training. Oh no, does this mean I'm a mag-seating-girly-man?!?! ;P

[Phelen_Kell]

happens all the time ...

it's probably just the vibration knocking the slide stop up when you're slamming the mag in.

[F.Dillinger]

I had never had this happen with my USP Elite before a friend of mine firing it at the range asked me about it. I asked him to show me what he meant, so he removed the magazine, locked the slide back, and slammed the magazine home. The slide went forward, and I asked him to stop beating the hell out of my gun. When the slide is back a full magazine should go into the gun with almost no resistance...the only time any amount of force is needed is after you've chambered a round and you're reseating a topped-off magazine, and even then you don't need to slam it that hard to get it to seat.

It may be a "USP" thing, but I find it's more of an issue with totally excessive force when inserting magazines. It's one thing to be sure of a positive lockup, it's another entirely to slam the hell out of your gun.

[Reheater]

See the thing is Im not so much forcing the mag to make the differnce my question is why will it only do this with a loaded mag and not an unloaded mag. I could bang it on the table with an unloaded mag and the slide will not come forward. All I have to do is seat it in a manner other then just gently locking it in and if theres a bullet/snap cap in the mag it will come forward.

[Phelen_Kell]

probably cuz the unloaded mag has the follower all the way up and it's catching the slide stop making it do what it's designed to do. whenever we are reloading under stress, this usually happens to us. granted, we're all trained that as soon as we load a mag, we grab the slide and pull it back a bit, but most of us have learned to notice when the slide goes forward on its own. besides, that one round or two shouldn't really make a difference, we all finish the course with rounds leftover, or some of us pull our back ups out to finish the course.

[Clockwork]

Read your manual; it is mentioned in there. Some say it happens all the time while others, like myself, have never had it happen.

I think it happens more often with a loaded mag rather than unloaded because the loaded mag has more weight behind it.

[HAMMERHEAD]

I'll agree it is a USP thing.
I've never had it happen with any other brand, but it always happened with my Elite, about half the time with a TAC, and once in a while with my .40.
And no, it not something we're doing wrong, it's just the slide lock slips down a little as you bump the gun up. You can fix it by stoning a sharp corner at the rear of the slide lock.

[NavyHK]

This is normal and is called "combat loading". I see it as a good feature and just another thing to hasten follow up shots after the (relatively) lenghtly proces of inserting a new mag.

[Reheater]

Wait Combat loading is when you remove a mag that has been used but not emptied and replace it with a fresh mag, you still have a round in the chamber for that. We're talking about empty weapon reloads and the slide coming forward when seating a mag.

Either that or our shooting instructors have differnt ideas as to the definition of "Combat Loading"

[9mmLuva]

Originally posted by Reheater
... Wait Combat loading is when you remove a mag that has been used but not emptied and replace it with a fresh mag, you still have a round in the chamber for that ...

+1

[LGCubana]

USP's do not need to B Glock slapped to seat a mag. If U choose to, that's your perrogative. But I think in the long run, UR adding unnecessary time to your tactical reload. It requires extra effort to forcefully slap a mag & if the slide doesn't go forward then UR 1/2 a step behind.