Adjustable Ruger 10/22 Bolt Spring and Guide RodHeavy Duty Spring and C-Clipped Rod Allow Custom Spring Tension Taking the Ruger 10/22 Bolt Spring and Guide Rod up a notch in precision, the Tactical Innovations Heavy Duty 10/22 Bolt Spring System lets you set-up your bolt to cycle and feed just about any ammunition. The clip retainer on the guide rod lets you take the spring off conveniently and snip a coil off the spring until it's just the tension you need. We sell the springs and guide rod separately so you can order extra springs to experiment with... This system allows you to switch out springs of different tensions for different applications... For example a lighter tension for cycling subsonic ammo. A smart idea from Tactical Innovations. We take pride in offering the very best products for your Ruger 10/22. From magazines to barrels, stocks, scope mounts, and action tune-ups. See everything on our website at Ruger 10/22 Accessories.