Some articles on locking ring, locking:
... The upper receiver consists of a housing, in which a locking ring is permanently fixed, and a Picatinny rail as an interface to the rifle scope ... Into the above mentioned locking ring, the bolt locks by rotation thus, the receiver with locking ring, bolt and barrel form the breech of the rifle ... APR rifle has a traditional manually operated rotary bolt with three radial locking lugs at the front ...
Famous quotes containing the word ring:
“I mount the steps and ring the bell, turning
Wearily, as one would turn to nod good-bye to Rochefoucauld,
If the street were time and he at the end of the street,
And I say, Cousin Harriet, here is the Boston Evening Transcript.”
—T.S. (Thomas Stearns)