This is a gun that I made completely off the top of my head...
Good Range 35-50 ft
Can pack a serious blow
Has a mag
Needs more power
Long loading time
not the best looking
Stock is iffy
The gun is worth giving a try. It can easily be modded I think. CHECK OUT THE X-11 ASSULT SHOTGUN!!!
Compare this first version VS. the new X-14
Link to X-14 https://www.instructables.com/id/Knex-X-14-Shotgun/
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