Parts details.

Air America body (centerfeed with angel threaded feed tube), we modified it slightly

Bob Long grip frame (old style with "humpback")

DYE asa.. they were cheap and look decent.

CCM pump kit.

Sergi backblock

Sergi delrin bolt with evo pin

Sergi valve body with WGP cup seal

Carter L-stock (usually use an old gas thru though)

All internal work is being done by Sergi and myself.

All body work and stock class feed tube by Brad Nestle of Paintball Maxx in Houston Texas.

Efficiency? Well, on my last chrony test, I got 36 full shots (260 was the last shot)and the bulk of the shots were between 290-300. Not too bad for unregged 12 grams. I may try regged on my next project gun.