Norinco NP-29 Which Wolff Springs?
- Thread starter johhny12gauge
- Start date
Any of the standard reduced strength mainsprings. Only the recoil spring is 9mm specific. The mainspring that powers the hammer is the same for all 1911's.
Note that you will also want to fine tune the leaf spring that supplies the return force for the trigger bow and the spring force for the disconnector. There's a bunch of good info about doing this simply a Google away.
Ah heck, just to save you a click or two here ya go...
http://www.brownells.com/.aspx/lid=12535/GunTechdetail/2-lb-Trigger-Pull
Note that this covers more than merely the spring tuning. But the portion about half way down about the leaf spring is very nicely done and the pictures illustrate what you need to do very well. I happen to have a very fine ceramic knife sharpening stone so I polished the face of the disconnector as well as stoning a rounded heel on the end of that leg of the spring so it rubs with a polished rounded heel against the angled flat of the disconnector.
This is far from a complete tuning job and much remains to be done in my own 29's case. But even just with a 15lb mainspring from Wolff along with the leaf spring tuning shown in that Brownell's link I'm sitting at around a 4 lb trigger break. It's very much lighter than the roughly 7'ish lb stock pull. To get it much lighter I'll need to get inside and do all the rest of the stuff that they show. That'll come later when my shop renovations are done.
Note that you will also want to fine tune the leaf spring that supplies the return force for the trigger bow and the spring force for the disconnector. There's a bunch of good info about doing this simply a Google away.
Ah heck, just to save you a click or two here ya go...
http://www.brownells.com/.aspx/lid=12535/GunTechdetail/2-lb-Trigger-Pull
Note that this covers more than merely the spring tuning. But the portion about half way down about the leaf spring is very nicely done and the pictures illustrate what you need to do very well. I happen to have a very fine ceramic knife sharpening stone so I polished the face of the disconnector as well as stoning a rounded heel on the end of that leg of the spring so it rubs with a polished rounded heel against the angled flat of the disconnector.
This is far from a complete tuning job and much remains to be done in my own 29's case. But even just with a 15lb mainspring from Wolff along with the leaf spring tuning shown in that Brownell's link I'm sitting at around a 4 lb trigger break. It's very much lighter than the roughly 7'ish lb stock pull. To get it much lighter I'll need to get inside and do all the rest of the stuff that they show. That'll come later when my shop renovations are done.
Basically yes. In my case I bought a couple of mainsprings as well since the one in my other 1911 is so badly deformed by past owners. I got one in anticipation that the Norc spring might be of poor quality. But it turned out to be just fine.
I found that the stock recoil spring was a bit stiff and would not let the gun lock back on the last round consistently. I "fixed" it by cutting one coil off the stock spring but that's not really the proper way. From the 1911 notes under the Colt semi auto guns I see that the stock spring for a 9mm 1911 is 14lbs. I'd suggest you get one of those along with a 13and 15lb so you can tune the gun. A proper tuned recoil spring will give you a consistent last round lockup with as stiff as possible a spring. If you go lighter it'll obviously lock up but the slide will hit the frame at max rear travel too hard. You want the spring that lets it lock up and throws the brass out nicely but no lighter. Getting these three springs will allow you to tune the gun in this manner.
They do charge for shipping so you'll likely want to look at your other guns and make up an order that makes it worthwhile. Otherwise you'll have yourself a $25 spring. And that's just silly. Just keep the total under $100 to avoid the whole ITAR export permits issue.
I found that the stock recoil spring was a bit stiff and would not let the gun lock back on the last round consistently. I "fixed" it by cutting one coil off the stock spring but that's not really the proper way. From the 1911 notes under the Colt semi auto guns I see that the stock spring for a 9mm 1911 is 14lbs. I'd suggest you get one of those along with a 13and 15lb so you can tune the gun. A proper tuned recoil spring will give you a consistent last round lockup with as stiff as possible a spring. If you go lighter it'll obviously lock up but the slide will hit the frame at max rear travel too hard. You want the spring that lets it lock up and throws the brass out nicely but no lighter. Getting these three springs will allow you to tune the gun in this manner.
They do charge for shipping so you'll likely want to look at your other guns and make up an order that makes it worthwhile. Otherwise you'll have yourself a $25 spring. And that's just silly. Just keep the total under $100 to avoid the whole ITAR export permits issue.
