Ion L7 Inner Bolt Stop O-rings are special orings that you will not find anywhere else other than here.
If there is one o-ring you should keep on hand, its this one. If your gun ever leaks it probably going to be this oring.
This is the o-ring kit you need for all of our L7 Bolts Inner Bolt Stops and Top Hats. This is the small oring that goes around the tail of all the L7 bolt series. This kit comes with 6 of the special orings you need for the L7 Bolt.