So I have a sba3 lower that with buffer tube is just under 15" to front of receiver threads. I'm calculating that with an 11.3 barrel I'd just under 26 at about 25.8 accosting for barre to chamber that is inside receiver (.660?) Maybe I’m wrong though.
Anyone else run a 11.3 (yes NOT 11.5) or something bigger and just squeezed in dimensionally. I'm assuming I'm calculating barrel right length allowing for the part of the barrel to bolt face inside upper.
Or am I totally missing something?