The Volquartsen Firefly 2.0 Bolt Assembly upgrades your Ruger 10/22 for optimal subsonic performance. This CNC-machined, Type III hard-anodized aluminum bolt is lightweight and designed to cycle with a wide range of subsonic ammo, from CCI Quiets rated at 710 fps to subsonic 22 LR rated at 1050 fps.The recoil rod allows the recoil rod spring to be easily changed. In addition to the ability to change springs, these recoil rods are precision-ground, hardened A-2 rods varying no more than .001" over the length of the part which means incredibly smooth cycling. The Firefly Bolt comes standard with two springs (reduced power spring installed), allowing you to tune your bolt for your setup. If you shoot subsonic 22 LR, the Firefly Bolt is a must-have. FeaturesCNC-machinedType III Hard-Anodized AluminumHardened A2 Recoil Rod includedRecoil Buffer included2 springs included (reduced power & regular weight)Designed to shoot any 22 LR round rated under 1050 fps Note: The Firefly Bolt is compa...