I too have one, and it's slated for my 10.5" Upper when I'm ready for that.
I would still look very closely at an 11.5" and M4M setup over the shortest/shortest that a 10.5"/M4S represents, since you're getter better all around performance for only a couple inches of OAL, especially for enclosed areas.
I've already decided that I will have to try my 14th in place of the M4S on that same host upper at a shoot house to see if that improvement is worth 3" of overall length.
عندما تصبح الأسلحة محظورة, قد يملكون حظرون عندهم فقط
کله چی سلاح منع شوی دی، یوازي غلوونکۍ یی به درلود
Semper Fi
"Being able to do the basics, on demand, takes practice. " - Sinister
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