We t91
 

How do I adjust the WE T91 Hop up? I don't see anywhere obvious where this can be done.

Thank you!

Open or closed bolt?

Open. Right now bbs are eating dirt at 50 feet. .23 bbs.

Above where the bbs feed into the gun there is a tiny hex screw. That is how you adjust the hop up. You will probably need to remove the bolt to adjust it. Turning the screw in puts on more hop.

I also have been having a problem with the gun.

Sometimes it fires and then the bb just falls out of the barrel. Any advice on that would be great too! Thank you!

That's because your hopup is turn down to.