I thought I had a problem with the bolt lock on my 10/22. I kept having problems with the bolt locking back several times per 10 shots, but it also seemed to be ammo dependent. I bought a commercial modified bolt lock (I think it was about $11 shipped), disassembled and cleaned the magazine, bought 2 new magazines and the bolt lock problem kept showing up. I was pulling my hair until I finally realized that I reassembled the receiver incorrectly!
I placed the bolt lock spring (B42) above the ejector pin (B35) and not below it. That does not put enough force on the spring to hold the bolt lock down and it was popping up and locking the bolt randomly. Of course if the recoil was stronger or milder because of the type of ammo, it made a difference as to whether it popped up and locked or not. Once I tucked the spring leg under the pin, I never had the problem again.
I placed the bolt lock spring (B42) above the ejector pin (B35) and not below it. That does not put enough force on the spring to hold the bolt lock down and it was popping up and locking the bolt randomly. Of course if the recoil was stronger or milder because of the type of ammo, it made a difference as to whether it popped up and locked or not. Once I tucked the spring leg under the pin, I never had the problem again.

. Once installed you will not have to worry about the thing ever giving you problems again. And as stated before make sure that you have the springs in the right place and that the bolt release is not just flopping around. Good luck and have fun!


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