Years ago I had a (non LOK-DOWN) swivel accidently open on my loaded 30-06 rifle. Gun fell to ground with barrel pointed at my partner. Poor guy darn near fainted and I felt like a heel. Fortunately, no accident here but a very scarey reason for LOK DOWN swivels.
Pros: Safe & easy to use
This review was written in the old system and had content requirements that are different than reviews written today.