.177 smooth bore (.183" ID seam less tubing). Barrel is 750mm long and uses a 24vdc solenoid valve, chamber is 1" x 12" sch40 stainless steel charged to 150psi from my compressor. Single shot bolt action. BB's not so accurate but the dome head lead pellets are pretty good
150PSI is safe to use push to connect fittings and hoses, you could have routed a larger chamber inside the handguard and have multi shot capability
CpTn_lAw wrote:
"yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? "
Took the scope off and making a peep sight as I only want to use it up to 10m range, rear sight has windage adjustment, range will be on the front post
Peep sight fitted, works nicely, had some adjustable stock parts from another build I didn't use so fitted that and made adjustable cheek rest as well.
Following on with the KISS principal I have changed the barrel to 6mm ID to use airsoft, I made the barrel slide now so the dead space will be minimal + less leaks. The tube I got from McMaster Carr is 8 x 6mm but was only 5.85 ID Much polishing later with a long rod and abrasive cloth and a BB rolls down it. Haven't tried it yet. Also mounted my old 4X scope offset to the left of the peep sights so I can use it as a spotting scope
Never being really happy with anything I pulled it apart again, changed it back to the .177 barrel, now at only 12" long (cut down the body), and made it a sliding barrel, much easier to load and zero dead space. Some work on the sliding stock also so it goes fully in.