Possible problem w/Ti-Rant 45k and FBS

I would like to know if anyone has had a problem with a Ti-Rant 45k and a fixed barrel spacer. Both are brand new and I have both the short and long .578x28 pistons.

Problem is when I remove the spring and replace with the FBS the piston housing will not fully seat when screwed back onto the suppressor. The gap is a little less then .25".

Waiting on an email from AAC also.

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