Originally Posted by notorious
Bolt and upper?
Just get another rifle. The cost would be about the same unless you found a great deal on a kit somewhere.
I did hold a Sig522, and it felt really good. A few guys on here have one. I just couldn't bring myself to spend $450 on a .22.
No, you can get a drop-in bolt conversion for about $150. You don't have to pull the pins or anything, just pop out the bolt and replace it with a new one. I think it's because the similarity in the caliber between a .22 and a NATO 5.56 round - so you don't even have to change the barrel out or anything. It's just a smaller bolt that can cycle and fire a rimfire cartridge.