SEMI AUTO

Provided By – Clide

Sorry for the stripped down page, but this got dugg and i’m trying to keep things alive.

Deemed the « Slider » gun in reference to it’s key part, the exhaust valve.

VIDEO FOUND HERE

Basically it is a fancy barrel sealing tee valve. The exhaust valve
used is a homemade version of McMaster part number 4622K57. In the
forward position, the input holes are connected with holes going to the
chamber. In the back position, the input holes are isolated and the
holes going to the chamber are exhausted to atmosphere. That means
input flow is cut off in the same motion that exhaust the pilot
chamber. The piston has a built in one way valve for a quick fill
without harming performance. If I had a high flow air source available
I could get up to .25″ input flow, but currently flow is limited by the
quick connect fitting. The stock can be pushed into the chamber when
the gun is not in use, and I tried my best to give it a fancy paintjob.
(3 days ago, waiting 7 days is impossible). I can get about 2 shots off
per second. Faster ROF could probably be obtained with an electric 3
way valve instead of the slide valve, but I wanted to stay away from
electronics.