Trigger Return Hesitation After LEM "Spring Trigger Job"?

[Specialized]

I have a P2000 that I did a LEM trigger "trigger job" on by replacing the two springs with standard HK USP springs. I love the resulting trigger pull but, like many others here, have found that afterward when I let the trigger move forward gently, it will bind and stop before it gets all the way forward, which it didn't do with the original P2000 springs.

Thinking this was the result of the wrong springs being used, I took both of them out of the gun and compared them to those on my USPc 45. I had earlier done the LEM conversion on this gun, but left the original springs in so as to have the lighter trigger pull. That gun does not exhibit the trigger return bind issue. In comparing the spring sets are identical, and in fact after I swapped the USPc springs with the new replacement springs, the USPc still doesn't bind and the P2k still does. I have to conclude, then, that the issue is the binding of parts within the P2k, and not the springs.

Has anyone here ever successfully polished up the parts in their USP or P2k pistol such that this binding problem was eliminated? If so, which part(s) needed polishing? Any help you could provide would be much appreciated, as I haven't been able to determine exactly where the culprit might be and I don't just want to wholesale polish all the innards. Thanks!

Specialized

[Big Bore]

It resets doesn't it? That is the only thing that matters. Every time this comes up I must ask, since when does one let off the trigger so slowly unless trying to cause a problem? And it is caused by the very light TR spring.
Either live with it and shoot the pistol like you mean it and quit milking the trigger on return or install the stiffer TR spring that HK has issued that solves the sluggish return to full forward position and have a pound heavier pull. Or you can shoot it a bit and let the parts polish themselves in.
Not trying to be abrupt but this is the short answer.

[ptechjpjr]

Hey Specialized,

I would put HK's trigger return spring part #209266 in both pistols and be done with it. This is the standard trigger return spring for a P2000 V1. If your P2000 started out as a V1 then I would put the original spring back in it and it will be fine. The factory USP V1 trigger return springs will give you a sluggish return of the trigger. There is a sticky post regarding this subject. I wouldn't waste time changing out the firing pin plunger spring since I believe both your pistols have the light plunger springs in them.

I had one of my USP 45 converted to the Combat Competition trigger setup and the above listed trigger return spring is part of that setup. After I got that one back from HK, I loved it so much that I converted my other USP 45 to LEM myself and installed the 209266 trigger return spring. Both guns shoot very nicely. I would also listen to Big Bore about not polishing any of your trigger parts, just install the 209266 trigger springs, shoot the hell out of it, and let it smooth out on its' own.

[Specialized]

Look, folks -- I'm not trying to whine here. I enhance and build 1911's, and am a SIG armorer as well. I'm just getting into HK's internals and trying to learn. I see people post about this as an issue, but have noticed no one looking into what would solve it. Obviously it's not an issue on some guns, and is on others. I'm just interested in finding out why for my own edification. When I find something that I think might be interesting or helpful to others, I post it, because I view it as a good way to give back to the people and forums I've learned from myself. It's always struck me as odd that HKPRO.com doesn't have a gunsmithing forum. And it's the only one I know of that has a forum for sightings of its products in the movies.

I shoot around 35,000-40,000 pistol rounds in practice each year, plus whatever I shoot in IDPA, single-stack, and 3-gun matches. I have had a few thousand hours of individual and team shooting and tactics training, a fair bit of it paid by your tax dollars. When I shoot this or any other weapon, I mean it.

Thanks for the feedback. If I find something interesting I'll post it.

Specialized

[Montrala]

Has anyone here ever successfully polished up the parts in their USP or P2k pistol such that this binding problem was eliminated? If so, which part(s) needed polishing? Any help you could provide would be much appreciated, as I haven't been able to determine exactly where the culprit might be and I don't just want to wholesale polish all the innards. Thanks!

I would look at area of trigger itself (does it move freely?) and trigger bar. Most drag on trigger bar comes from bottom part, that rests against spring loaded detent. Next would be sides of trigger bar. Examine triiger bar for traces of contact with other parts (or use dykem). Sometimes trigger bar can be slightly bend and touch gun slide (my P2000SK had it) or side of the magazine.

My old P2000 with dry trigger action and weak trigger return spring wasn't resetting at all. Ensure good lubrication with low visconsity (I use gun oil in such setups).

[LSP 972]

Look, folks -- I'm not trying to whine here. I enhance and build 1911's, and am a SIG armorer as well. I'm just getting into HK's internals and trying to learn.

I hear you. The spongy trigger return was one of the first issues that popped up with the "spring swap" deal on LEM jobs. For that reason, I swapped the FPB spring but left the trigger return spring alone in my first USPc .45

My wife has a pair of LEM-equipped P2000s. The triggers on both aren't quite as "light" as my USPc .45 with the FPB spring swap, but I elected to leave them alone; she does fine with them as they are.

Apparently, spongy/slow trigger reset isn't an issue with some folks. ;)

.

[ptechjpjr]

I see people post about this as an issue, but have noticed no one looking into what would solve it.


Hey Specialized,

I'm not sure what you mean when you say that no one is looking into solving the problem. There is a Sticky Post that deals with the exact issue here and gives part numbers to solve the problem. The sluggish reset has to do with the trigger return spring, not the firing pin block spring. In my previous post I gave you my experience with both of my USP 45s and told you that they both reset perfectly (fast or slow), so I don't know how you can say no one is trying to resolve the problem. I don't know if I would get involved with polishing any trigger parts but if you do, be meticulous with the type of oils you use on the trigger parts. I highly recommend Sentry Solutions lubrication products. They were recommended to me by Travis at HK and they are incredible lubricants. There is a lot of good info on this forum just be patient and look around, we are all here to enjoy the HK experience.

I also love my Sig P229 40 cal, Beretta Cougar 40, S & W 1066 10mm, and Ruger Redhawk 44Mag, but if it came down to it, The HK's would be the last to leave my collection.

[Maurice]

I had a similiar problem with my Custom sport a few years back,..I had some plastic shavings from the frame rubbing against the trigger where it sits in the frame. After I filed these off,.no problems. If the problem only started after you changed springs,.I would say it was the in this area you should look.