Benjamin Bulldog 290FPE "Beast Mode"
"DISCLAIMER" Going above factory rated pressure should not be attempted. I recommend an upgraded pressure tube if higher pressure is desired. Opened up the transfer port size to 5/16", Reshaped the poppet head and removed the return spring. Shortened the factory hammer spring to 2.4", added a 10.5 gram brass hammer weight .400" in height and put a gauntlet spring inside the factory spring. Filled the gun to 3650psi and fired 3 shots with Benjamin Nosler 145gr slugs.
