Bolt O-Ring and Detent Kit

Replacement O-Ring and detents kit. Kit includes two 1/4" bearings and spring to replace or repair your current detents as well as a replacement O-ring to replace the commonly worn out O-Ring which provides a seal between the bolt and barrel.
Two options are available. High and Low tension:

High Tension is most likely to hold your bolt closed and in place when firing one-handed. However, because of the pressure it exerts on the bolt tube, this can result in increased wear over time and "stiffer" cycling. These springs have a maximum load of 6.25 lbs and a spring rate of 28 lb/inch.

Low Tension will hold your bolt in place when running and when the marker is pointed upwards, but is not strong enough to hold the bolt closed while firing one-handed. However, it does result in less wear/tear on the bolt tube and is easier to cycle. These springs have a maximum load of 3.75 lbs and a spring rate of 12.5 lb/inch