I have a couple of pals with 10TRs and they're bolts are fine, but mine had a bit of slop in it so I picked up a PTG fluted stainless bolt body for it, and also a 20MOA rail from Italian Sporting Goods' two day sale (25% off the rail). Threw it on there, so I'm gonna have to re-zero it...again. The bolt body was pretty easy to install, just watched a couple of youtube videos and took me about 15 minutes to swap it out. The new bolt body is heavier, and the overall diameter is thicker by just a hair, which was enough to take up a lot of the slop when working the bolt.