I recently worked on a few of my pistols- an HK45, 45c, and P30. I had a lot of help from this forum, and wanted to give something back. Here is a little infographic I made to help recognize different hammer springs for these models. Feel free to add pictures of your own hammer springs and their lengths if you have them.
Just as a clarification, it appears that 214300 and 215694 with the 215694 being just a tad lighter. If you have an extra spring of either one, feel free to take a photo and upload it. It seems like both can go into an HK45, but the 215694 isn't indicated for the P30. This is kind of confusing. Can anyone explain this one?
In any case, feel free to edit the photos if you feel there has been a mistake.
Last edited by GreekOrtho84; 01-17-2018 at 08:53 AM.
Very cool!! Thank you. This is a great forum!
Excellent tutorial--- thank you!!!
Don't believe everything you read on HKParts or a couple of other online vendors (Brownells comes to mind.) I found too many mistakes in their listings over the years. They also use the same picture for many different parts so beware.
215694 is the Match Hammer Spring (also used in older USP Compacts) and can be used in ALL pistols, except the HK45C, SKs, and VP series.
Here are the measurements from actual springs in hand. When I have more time, I'll get the measurements for the rest of the springs.
Do you happen to know the length and # of coils on the HS #234479 for the HK45C?
The one that was sent to me is 2.5" with 41 coils and does not fit.
I got to reading various posts about hammer springs so I finally tried switching out the factory spring on my USP40. I believe the factory is a 14 lb spring so I went to Wolff and bought a 10 & 12 lb spring. Thought I'd try the 10 lb first to see if the rounds still went off. The trigger is a bit lighter now and 40 rounds of my own reloaded ammo went off perfectly. Taking my time and shooting one handed I was able to put ten shots into the 5"+ diameter black area of a target at 25 yards. Note that I did not do that well each time I tried but for a minimal investment of time and money I am pleased. I have a match trigger parts package being shipped to me and am hoping the additional parts will make it even better. I'd recommend everybody try the spring replacement. If you aren't happy it only takes a few minutes to switch back to the original.
The red hammer spring on the left is what came in my 9mm USP Compact LEM (My USP Compact was the Classic Firearms import special awhile back). The black spring on the right is the longer of the two springs from what is in the LEM kit.
Maybe I missed it, but I'm just looking for some clarity. The red spring has 41 coils, so I *think* it's the same as 214300...anyone want to confirm this? I have no idea why it is red. For comparison, the black spring has 28 coils and is from the LEM kit and should be 214695.
 USP 9  USP 45  USP 9 Compact  VP9  VP9 SK  P30 SK