Offered is what I believe is a vintage "Special" AKRON NPSH brass pistol grip firefighting nozzle specifically designed for use on DC, DK, and MR type fires only (see 3rd photo). Front to back it measures just under 9.
Everything appears to function properly, but I do NOT know if there are any gaskets to worry about. I try to describe my items to the best of my knowledge, but I'm not perfect and could easily miss something.