BONK - .22 survival rifle.

Parts list:

*Section of 15 mm OD air rifle barrel or 15 mm hydraulic seamless tubing, at least 100 mm in lenght 
*8-12 mm spring for the striker.
*6 mm spring for the sear.
*4-8 mm spring for barrel lock.
*Two 6-8 mm springs for the stock.
*4 mm screw at least 40 mm lenght.
*A hefty pile of 3 mm screws of varying lenghts from 35 mm to 10 mm.
*One 10 cent euro coin.
*1.5-2 mm drill bit for firing pin.


Main assembly should be quite obvious, as shown in the pictures. Barrel lock retainer thingy can be glued in place with epoxy, jb weld or any superglue.

Glue 1.5 mm drill bit inside striker housing and cut it so that it only sticks out about 2 mm from breech face. Grind or cut the tip until it resembles a chisel.

For .25-.27 cal print appropriate body and striker versions, 
as firing pin position is extremely important for reliability.

Drill 2 mm hole in the coin and glue it on the breech face.

Inner barrel should slightly stick out inside 4mm hole that retains the barrel housing. Mark the area that sticks 
out with a sharpie or scratch it slightly with a drill bit and then make about 2 mm deep and 4mm wide cut in the 
marked area using an angle grinder or a dremel. 

Breech end of the barrel should be chambered with 6mm reamer bit for a preffered round (about 25 mm deep for .22lr)
and then polished with a dremel.
Grind a small notch in lower right corner of the barrel to aid extraction of spent casings (knife or any small flat screwdriver could be of use).
For .27 and.25 (6.3 and 6.8 mm) nail gun cartridge chambering, closest standard reamer sizes are 6.5 and 7 mm.

Make sure to avoid highest power black and red tipped cartridges, these generate too much pressure, which often
results in disintegrated pellets and plactic fragments lodged in shooter's face. 

It's possible to use .22, .25 and .27 ID barrels to fire corresponding pellets with .27 or .25 cal cartridges, 
but bores larger than 6 mm should not be used with .22lr cartridges, as primer strikes become unreliable and their casings tend to rupture and 
accuracy becomes abysmal.


*Pirate edition is an older prototype version of this firearm. these files may contain some minor bugs and nuisances, such as incomplete screw holes
and the need for glue to secure the left grip.