New, it has only been mounted to test fit. It comes with a special factory mod to allow Knight MK11 MOD 0 fold down front sight!
I am changing weapons systems and nolonger need this awesome set up. The Sparkman tube is the standard rifle length not carbine.
You know what they go for new, here is a deal.
Mine is new and I'll sell it for just $250 and it has the mod you won't have to spend money or time on for free!
$250 + $8 shp
Trade for KAC FF RAS Full Length