just put new springs in the 10/22. wow what a differance. just ran three 50 rounders through it and never missed a beat. installed a new bolt spring, a firing pin return spring, a hammer spring, a new firing pin, a new extractor and spring. feels like new again. tough to believe what a weak spring can do. i had the extractor but i just had the rest sent to me from ruger. they sent it in three days for $12.50 shipping included. that's a good deal.