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Posted by Thwack on May 15, 2002 at 20:35:41:
In Reply to: The AT-85 intrigues me... posted by
well, as i have 2 finals im avoiding to study for so my @ss can finally graduate, i'm gonna keep it short for now, maybe i'll add in a day or 2. an AT is basically a nelson based action (trracer, phantom). hammer and bolt are separated by spring, and hook together when cocked. when the trigger is pulled it releases the hook that holds them together, hammer slams into valve, sendign air thru bolt. then a little weight in the hammer slams back a little further once the hammer has stopped, and activates a rocker switch that operates a valve that works like the 3-way valve on the cocker,pushing the bolt back onto the hammer and hooking them together, then pushing the whole assembly back into the breech while resetting the little rocker switch. oh yeah, in additon, the moving bolt has some ratcheting teeth on the bottom that hook onto the chain on the clip that feeds the balls, and pulls the chain back a ball's legnth as it goes back into the hammer, and skips over the chain as the hammer/bolt assembly moves back into the breech. so much for a short answer... its a pretty complex system yeah, but once you understand it, it makes more sense.
1st of all, go to where gumby sent you, itt'l explain it pretty well.
its kind of like an autococker action, but the timing is taken care of by the little weight in the hammer.
the FA switch basically keeps the trigger sear from resetting so the bolt and hammer dont stay hooked together when they come back into the sear, it just fires again.
-Thwack
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