[Flatlander]

@ dpvu: swapping mechboxes will be my very last resort. It took quite some time and tinkering to get my m4 to shoot the way it does and I'm scared to tear it down now, haha.

@ Corpo: Chrono seems fine as my other guns chrono where they should be. I also was firing my guns on sunday in a warehouse and couldn't even puncture the cardboard targets!

@ Amos: Are you sure you mean cylinder head? The oring is greased and plunging the piston into the cylinder manually revealed no leaks around the cylinder head. The cylinder head does appear to NOT be as snug in the cylinder as most I've seen; I'm wondering if the fast moving piston hits hard enough to break the seal and cause blow by through the cylinder head. I don't have a spare (quality) head to swap out unfortunately.

Also, how would you put a few drops of silicon oil into the cylinder head? I'm assuming you mean without disassembling the mechbox.