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What is a knex sear trigger and does somebody has a video about how it works? Answered

I wanted to make an knex Spas 12 since it's a really epic gun.
I saw some and most of them didn't have a real pump action system. So I thought I could make one on my own.
I spent 3 days working but I had trouble with the trigger and pump system. 
Some people said I had to use a sear trigger but I didn't understand. Help?!


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Best Answer 8 years ago

In the simplest terms, a sear trigger "holds" the pin rather than blocks it. Generally, this method is used to allow the trigger mechanism to be much further back than the barrel (which indeed would be optimal for your pump mechanism). Basically, a part of the pin that holds the bands will catch on the trigger.

dr. richtofen
dr. richtofen

8 years ago

Well, an sear trigger blocks the ram at the end of it, where the rubber bands are ''attached'' instead of in front of it. Here are some examples:
- https://www.instructables.com/id/knex-gun-with-new-trigger-%26-sear-system/
- https://www.instructables.com/id/High-power-knex-pistol/
- https://www.instructables.com/id/Knex-pistol_1/