The RN-K he calls it.  It’s slamfire and you will be able to order it in multiple calibers:

Ya using AR parts is a no-brainer.  Guys in the comments don’t seem all that trilled he decided on this simple slamfire… they wanted a kit for the semi-auto grease gun.  I’d have to agree with everyone on that.  Maybe he will reconsider once he sees the comment outrage.

Naturally there are also several comments similar to this one from wrangww2 LOLOL:

i hope you get someone to weld the guns for you… Your welding gives me cancer

Thoughts?