View Single Post
Old 11-26-2012, 08:22 PM   #53 (permalink)
Summer's a-commin'
cobyrne's Avatar
Join Date: Feb 2008
Location: Dunedin, NZ

Originally Posted by MR_Rick View Post
Some one correct me if I'm wrong, but what does this spring has to do with the pump returning to the forward position when the hammer is cocked? That spring is compressed between the hammer and bolt, so how does it assist the pump in coming to the forward position? I know it does it when there is no air because the gun isn't cocking but with air?

I'm not familiar with the forward return pump since mine doesn't do it and I never had a pump that did, so it is natural for me to have to do ONE full pump cycle manually. I'm curious about this now and will like to try it. Mine doesn't have the return spring but I'm planning on ordering the UC anyways, will it come with the spring?
No you're not wrong. When aired up the internal springs have nothing to do with returning the pump forward. The main spring between the hammer and the bolt is compressed between the two as you suggest and the valve spring is not connected to the pump arm in any way.

The pump return spring is appreciated by some, is annoying to others, and some of us just don't care if it's on there or not. It doesn't come with the UC kit so you'd have to order it, but if you do you will also want to ask for the little plastic washer that sits on the pump arm against the trigger frame. Without the little plastic washer (and even with, but less so), the return spring is compressed against the trigger frame, which in turn pushes it against the pump arm because of how it is angled - this causes noticeable friction on the pump arm.
MCB Feedback
cobyrne is offline   Reply With Quote