lockring การใช้

The smaller diameter thread on the fixed side has reverse / left hand threads to accept a lockring.
Both machines use rotating lockring doors; the larger one is hydraulically turned, the smaller is pneumatic.
Hyperglide freehubs use a lockring to hold the cassette in place that screws on to the inner part of the freehub.
Recoil pushes the barrel, lock and bolt backwards until the lockring hits a cam that rotates it unlocking the bolt and barrel.
The bolt continues pushing the round into the chamber and locks up when the lockring rotates and locks the bolt and barrel extension together.