Receivef my 3 lug to 1/2 x28 from HK parts thr other day. Thought I knew how to use it, but I honestly cant figure it out and dont want ti break it. It slips over the 3 lugs, but is very loose/sloppy. There is a gate type device that flips up and is spring kept down. What am I missing here? What is the order of instal and securing of this adapter? Thanks for any help on this.
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