A 10/22 must have imo - TANDEMKROSS Barrel Retaining V-Block

If you've ever built or reassembled a 10/22, you know the challenges with barrel droop. Some higher end receivers and barrels are so tight tolerance it is not as much of an issue, but even then you can get a tiny bit of droop from the v-block pulling down on the barrel. The TK V-Block fills the gap between the barrel notch and the block. You get upward pressure from the V-block along with the tension to hold in the barrel. It does take a little extra time tightening it slowly to make sure everything stays even and level, but it removed pretty much all the droop on my Kidd Bull Barrel and Faxon receiver.