SMAC Mag: Spider’s Minimal Analog Control Paintball Gun


[Spider!]’s contribution to the pantheon of paintball markers is the SMAC: a unique revision to one of Airgun Design’s ever-popular Automags. We needed our tipster, [Russell] to provide some context on the Automag’s evolution, because the brand has served as a popular hacking platform for nearly 20 years. The most frequent is a “Pneumag” modification, which converts the original, fully-mechanical trigger pull into a version where the trigger actuates a pneumatic cylinder to fire the gun.

According to [Russell], the Pneumag’s trigger must completely release between each shot to properly recharge the firing chamber. Without a full release, the gun can load extra balls into the barrel and lead to gloppy consequences. Electronic controls solve this problem, but [Spider!] favored an analog solution that captured a “less is more” mentality over a pre-fab microcontroller board. He built the circuit around a 556 timer used as a delayed re-trigger, but with a few modifications.

Swing by [Spider!]’s forum post for additional details, a cluster of pictures and a bill of materials. Microcontroller alternatives? We’ve got you covered.

8 thoughts on “SMAC Mag: Spider’s Minimal Analog Control Paintball Gun

        1. Really? It was the second IC I ever used.

          Anyway, I came to say that modding paintball markers with a handle of ‘Spider’ is very confusing as it is also a brand name in that field. Probably a trademark violation too.

  1. For anyone wondering “why,” this hack takes a relatively ancient yet well made gun platform, and makes it perform in league with modern high-end paintball equipment. The use of a timer circuit is fitting for its old school style!

Leave a Reply to XOIIO Cancel reply

Please be kind and respectful to help make the comments section excellent. (Comment Policy)

This site uses Akismet to reduce spam. Learn how your comment data is processed.