Minimised/zero-dead-space Big Foam Dart launcher 

Want to reduce dead-space and overall length in a BFD launcher system?
What if the spigot WAS the launcher??
Big Foam Dart here rigged up with a 38mm bore lined with a reverse-wound anti-burst inner sleeve of masking tape. The tape is wound around a NARFXBZ (u/airzonesama's replacement for the SPEXBZ...) with the adhesive-side out to create a sleeve with a slippery inside and a sticky outside that perfectly matches the exterior of the spigot (ie: the NARFXBX tank itself).
Aside from the fitting to connect the valve to the rear of the tank, the WHOLE set-up now takes no more length than the projectile.
• Full Imgur album here: imgur.com/a/ze...
• Older post on the NARFXBZ here: / airzones_narfxbz_spexb...
• Foam Experimental Rocket Research and Engineering Testbed (F.E.R.R.E.T.) project, initial Imgur album here: imgur.com/a/t1...