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8/31/2026 8:37:29 PM EDT
So putting my Tirant 9M on my AP5, I end up having to tap the can off with a rubber mallet. No issues on the four other guns I have Griffin 3 lugs on.

I really dont want to go direct thread or send back to Century. What are my options? Should I try and file them? Maybe try some metal polish? Mount another 3 lug mount to the threaded portion of the barrel? That might look funny.......

Any thoughts or input appreciated.
Does Somebody Need A Hug?
8/31/2026 8:51:25 PM EDT
[#1]
One of my AP5s was REALLY tight on the 3 lug with a CGS suppressor. I ended up getting a slick thread protector instead of the knurled version and then hitting the lugs with a super fine grit sand paper to just knock the finish off the high points. Worked perfectly until I sent it off to be converted to an SD.
9/1/2026 1:52:08 PM EDT
[#2]
My AP5 lugs are pretty tight as well on my AAC Tirant9m. The last time I took it off for cleaning it was a bit stubborn , but came off. I cleaned it up and remounted and it went on and off much easier.

9/1/2026 10:02:43 PM EDT
[#3]
Check the grease on the tri lug adapter.

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