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AR stock question

Namekagon

Oracle of the Hide
Full Member
Minuteman
Mar 22, 2018
984
2,041
Wausau, WI
Ok, I’ve searched a little for this, but wasn’t getting helpful info. What I would like to know is, in a pinch, will a standard plastic commercial bushmaster style collapsible buttstock work on a mil-spec tube?

By work, I mean locks up at least on 1 or 2 adjustment positions. Don’t care if it rattles around. Just has to be shoulderable.

thoughts?
 
Mil spec diameter is smaller. So wouldn’t a commercial stock fit on the mil tube, but be extra loose? What I’m wondering is if it will lock into an adjustment notch.
 
Its the usual problem AR owners have. Bunch of spare parts laying around, trying to conglomerate them together again into something functional as a backup gun. I have been offered a free mil-spec tube, but stock i have is commercial. Hence the question.