The ACOG leash…
Army’s PS Magazine put out the correct way to retain a CCO.
“No more disappearing sights,” the Army on CCO leashes via infotoon from last year:
“Too many times we are seeing Soldiers use lacing wire or 550 cord incorrectly causing damage to the weapon and optic. Note, if you are still using 550 cord make sure that it is not wrapped around the gas tube under the handrail, the cord can melt due to high heat,” says PSM.