Just a set of M3 bolts, an elastic rubber band and you'r all set. Oh I forgot, a 10 cent euro coin or, 1 dollar cent, or equivalent. A 12x2mm neodymium magnet to hold the cap in the barrel upon lancing completes it. Available for a few cents on AliExpress or similar.

This is a strong and wel build design. It's also safe as a bottle cap is a very big object and the speed it's fired is gentle. This is all ment for fun so it's designed to not look as a real weapon as much as possible.

The print does need some support but only for the two body halfs. No further cleanup.

Have Fun and please give me likes please and of course share your make!

The barrol is compatible with most caps out there. According the international standard for caps, DIN-norm 6099. Cap size 32.10... should be the biggest.

UPDATE 24-10-2019: Made the trigger spring end a bit longer for more spring action.

UPDATE 15-12-2019: Enhanced clearances (0.5) for the trigger axle and pusher components for both models after feedback from the community. Advice to tune your slicer. +/- 0.2 should be your maximum tolerance.

UPDATE 28-12-201: STEEL AXLE Some of you complained about breaking the plastic axle. I changed the position of one of the construction bolds so it is an axle to. As for me not the most elegant solution because if your 3D setup is tuned well it should work fine with the plastic. Both models are here to download.. Pick wise...

Witch pieces do you need to print per model:

Version with steel axle:

Beer_Cap_Gun_left_half_32mm_Steel_Axle_v1.stl

Beer_Cap_Gun_Right_half_32mm_Steel_Axle_v1.stl

Beer_Cap_Gun_Pusher_Block_v8.stl

Beer_Cap_Gun_Pusher_v9.stl

Beer_Cap_Gun_Steel_Axle_Trigger_v1.stl

Beer Cap Gun Spanner v8.stl

Plastic version:

Beer Cap Gun left half 32mm v2.stl

Beer_Cap_Gun_right_half_32mm_v2.stl

Beer_Cap_Gun_Pusher_Block_v8.stl

Beer_Cap_Gun_Pusher_v9.stl

Beer_Cap_Gun_Trigger_v8.stl

Beer_Cap_Gun_Spanner_v8.stl

BOQ

One rubber elastic band (Post man type)

Bolds, Hex or Philips or what ever

2mm X 12mm neodymium magnet. Or smaler!

3 x M3 X 8

4 x M3 X 18

One coin: round 20mm and 2 mm thick. Such as a 10 euro cent or a 1 dollar cent.

Print Settings

Printer brand:

Creality

Printer:

CR-10S

Rafts:

Supports:

Yes

Resolution:

1500

Infill:

30% for most parts, print the trigger solid!

Filament brand:

REAL

Filament material:

PLA

Notes:

PETG is too flexible I think so use PLA. Print the trigger SOLID!

Print it strong so it will not break while opening bottles.

Bottle Opener and Cap GUN

0.2mm layer, 2 walls, 15% infill