[crp]

I am thoroughly confused... I just want to know if it's possible to modify a V1USPc9 or USP45 to get a light LEM pull in DA while keeping its regular SA pull. Is there any other USP variant that may be equivalent to this, or that may be modified that way? In other words, I'm trying to do something to keep a traditional light SA pull yet have a heavier but still light first shot DA, and also keep the MS and Decocker functions. My ancient and arthritic trigger finger really needs a shorter and lighter DA pull than the one on both my V1 USPc9 and USP45!!. TIA!

 

[Brownie]

I'm trying to wrap my head around what you are after but initially I would have to say that you aren't going to get where you're after. You can have LEM or SA/DA but not both. The reason that the LEM pull is so light is that the hammer is "pre-cocked" for lack of a better term. I know one of the conditions is to keep the MS and decocker so true LEM is out. That being said you may be able to lighten the DA pull with some spring changes but you won't get a "light LEM" pull that you seek. If someone can think of a way to make this happen i sure would like to hear it.

 

[crp]

I'm trying to wrap my head around what you are after but initially I would have to say that you aren't going to get where you're after. You can have LEM or SA/DA but not both. The reason that the LEM pull is so light is that the hammer is "pre-cocked" for lack of a better term. I know one of the conditions is to keep the MS and decocker so true LEM is out. That being said you may be able to lighten the DA pull with some spring changes but you won't get a "light LEM" pull that you seek. If someone can think of a way to make this happen i sure would like to hear it.

From what little I know of the internal workings of these pistols, I tend to agree with you that a LEM DA trigger on an otherwise DA/SA weapon with MS and decocker might be a physical impossibility. That being said, I find it hard to understant why... :frown: My guess is I have the option, as far my worst offender is concerned, my USPC9, to put in a 10 lb hammer spring. Otherwise, I might have to go with a light LEM pistol. Being thoroughly confused about HK variants [except the USP V1-4], my next question is whether it's possible to get a light LEM pistol with an external MS. Is this about right? Anyway, I sure would hate to lose that 4 lb SA pull...

 

[eldemando]

Good luck finding anything but LEM V2 (Heavy LEM). You can try to order Light LEM but waiting weeks or even months for it isn't necessary.

The other "variants" are simply a matter of exchanging main, trigger rebound, and firing pin block springs to get lighter trigger pulls. My P2000SK V2 is Heavy LEM. Or was until the spring change. Was a horrible 9 pounds pull out of the box. About 5.5 pounds now with the trigger rebound and firing pin block springs.

My USP9c V1 converted to LEM (via V3 for a very short period) was also about 9 pounds with the "kit." Running just a hair over 5 pounds at present using the V1 mainspring and the Light LEM trigger rebound and firing pin block springs.

HK parts in Columbus knew what parts I needed for Light LEM before I completed my sentence.

Chuck: "I'd like to order some springs for my P2000SK LEM, please..."
HK Rep: "That'd be the trigger rebound and firing pin block springs, right?"

Same springs in the P2000 and USP LEM so I ordered two sets. Came in less than a week.

-- Chuck

Older-but-useful post. Thanks!

 

[ARCTICDETH]

With all the good info here, make this a sticky for future reference.

STICKY------sticky----------sticky

 

[scubadds]

good stuff here, I struggle with all the variants.

I realize that these variants are here for personal preferences or specific needs (maybe agency or department specs)


Is one variant "better" than the rest for carry/defense/gun games? (ie more people prefer it than other variants, due to good reset, lighter pull weights or safety)

The LEM seems to be mentioned most, is the LEM light a highly desirable choice??

To narrow it down a bit, I was thinking of the P30 lineup (p30l, p30 and p30SK)
I could see myself getting rid of a few glocks and going that direction; then maybe an expert 9mm or tactical

 

[NickScud]

Need advice from HK gunsmith please: I recently purchased and installed a match trigger kit to my USP .45 (1995 variant). The install went perfectly smoothly, albeit for the fact that my kit did not come with a stop-screw and/or allen key. This was solved by HK after a few days, so problem solve (I THOUGHT). The match kit improved the break on the trigger slightly, however it has NOT (at all) improved/shortened the reset, which was half the reason I purchased it. Is it possible I receive the wrong catch (hope I'm naming the right part - it is the small part [one of two mating parts] in the sear-group. I am fairly certain it was slightly different than the stock one, BUT, I did not examine it with a fine toothed comb. It is the only explanation I can think of, why my reset would not be improved, as the kit is advertised to so. OR, can a professional HK smith please correct me, and indicate what may be going on.. The best way I can describe reset is this: THe reset point is identical to the point that the trigger "lands" at when the hammer is cocked - upon reset, I have a nasty-long take-up accordingly. THe stop screw is set correctly, the break is better than stock, however the reset is very disappointing. THe only explanation I can come up with is that this part was the OEM version, and not the match version. Since the kit was missing the screw, it's the only logical one I can come up with.. would very much appreciate your input. thanks in advance!

 

[mikecu]

This is for USP pistols, is this what youre asking for?
[Directly from H&K web site]

USP Variants:

Variant 1:
 Double action/single action with "SAFE” position. Control lever (manual safety/decoking lever) on left side of frame.
Variant 2: 
Double action/single action with "SAFE” position. Control lever (manual safety/decocking lever) on right side of frame.
Variant 3: 
Double action/single action without "SAFE” position. Control lever (decocking lever) on left side of frame.
Variant 4: 
Double action/single action without ”SAFE” position. Control lever (decocking lever) on right side of frame.
Variant 5: 
Double action only with ”SAFE” position. Control lever (manual safety) on left side of frame.
Variant 6: 
Double action only with ”SAFE” position. Control lever (manual safety) on right side of frame.
Variant 7: 
Double action without control lever (no manual safety/decocking lever)
Variant 8: 
Double action without control lever (no manual safety/decocking lever)
SPECIAL VARIANT FOR GOVERNMENT AGENCY
Variant 9: 
Double action/single action with control lever (manual safety/no decocking function) on left side of frame.
Variant 10: 
Double action/single action with control lever (manual safety/no decocking function) on right side of frame.

I have a USP/c from 2005 that is DA/SA, left side safety, bobbed hammer, and no decocker. Can you tell me what it is?

 

[Kost]

I have a USP/c from 2005 that is DA/SA, left side safety, bobbed hammer, and no decocker. Can you tell me what it is?

Variant 9: 
Double action/single action with control lever (manual safety/no decocking function) on left side of frame.