Funflyer
02-09-2021, 01:49 PM
After reading about all the recoil spring issues owners have had, and my P380 finally starting to have too many light primer strikes at less than 450 rounds, I thought it was time to look for a better spring option. I recalled reading on the forum about someone using the spring from their Sig P938 and since I was going to replace the one in my Kimber Micro 9 (same as P938) with north of 1000 rounds through it, I thought I'd give the old one a try in the Kahr.
Since the flat spring has a smaller ID, and compresses to a slightly shorter length than the stock Kahr springs, I decided to make a new guide rod to correct the differences. The results turned out much better than expected. The new(old) spring has about 3/4 to 1 pound more pressure when in battery than the stock springs, and pretty much the same pressure when fully compressed. It was hard to get an exact reading on the trigger gauge since it only goes to 10 pounds on the scale, but both spring setups exceeded 10 pounds+ at the same(ish) point of slide retraction. The big difference is that the single flat spring is so much smoother and the pressure is much more linear throughout it's entire travel. For those wondering, the new spring takes a bit more finesse to install but isn't too bad once done a few times.
Only fired 60 rounds so far with the new spring, but all went bang on the first trigger pull. With the stock springs I was starting to see one light strike every couple of mags.
Since the flat spring has a smaller ID, and compresses to a slightly shorter length than the stock Kahr springs, I decided to make a new guide rod to correct the differences. The results turned out much better than expected. The new(old) spring has about 3/4 to 1 pound more pressure when in battery than the stock springs, and pretty much the same pressure when fully compressed. It was hard to get an exact reading on the trigger gauge since it only goes to 10 pounds on the scale, but both spring setups exceeded 10 pounds+ at the same(ish) point of slide retraction. The big difference is that the single flat spring is so much smoother and the pressure is much more linear throughout it's entire travel. For those wondering, the new spring takes a bit more finesse to install but isn't too bad once done a few times.
Only fired 60 rounds so far with the new spring, but all went bang on the first trigger pull. With the stock springs I was starting to see one light strike every couple of mags.