yes like everyone else said its open-bolt...if you go to pbnation and go to the diablo forum and look in the sticky's you'll find everything and i mean EVERYTHING about the wrath/mongoose there.
__________________ Wrath Owner
My Setup:
Black Diablo Wrath
Fbm "original" Trigger
Egg 2 with 9v mod.
72/ 3,000 psi PE tank
^ if im not mistaken, blow forwards is when the bolt functions as the bolt and part of the valve, like in mags, shockers, and ions. its EP spring-returned blowback