Single shot blaster

This is my take on a single shot blaster. You can use either full or short darts. There is a single shot barrel (recommended) or a 3 shot barrel (optional)
you need some other parts to assemble the blaster

1x M100 airsoft spring
1x 32mm PP pipe ID 28mm (cylinder)
2 x 300 mm M5 threaded rods
1 x 200 mm M4 Threaded rod (priming rod)
13 x M3 nuts
9 x M4 nuts
4 x M5 nuts
4 x M5 washers
6 x M3x8mm bolts
2 x M2x12mm bolts
4 x M3x20mm bolts
2 x M4x20mm bolts
1 x 7x12mm compression spring
2 x 28x3,1mm O-rings

I recommend getting a nuts and bolts assortment box.
Also a compression springs and O-ring assortment box.