Air Gun Home :: View topic - Any Tips On Smoothing The Action On A Disco?

Mark5043 · Silver Status Member

Well so far I'm really enjoying my .177 to .22 conversion on my Disco.I haven't noticed any loss of accuracy between the two calibers.I really love this little shooter.I was just wondering if anyone can give me some tips on smoothing out the action?It is kind of rough,when pulling the bolt back.I'm a-little green in the gun smithing dept.What do some of you guys do to accomplish a silky action? Mr. Green

rsterne · Moderator

Since you are cocking the hammer when you pull the bolt back, my guess is that there is a bit of grit, or a lack of lubrication, between the hammer and the inside of the tube.... I would disassemble the back of the gun (remove the barrel and breech and trigger assembly, and then the end cap and slide out the hammer and spring) and check for burrs along the top (cocking) and bottom (sear) slots.... Carefully debur those, clean throughly, and lubricate sparingly with some moly paste (grease) thinned with oil.... a dab of moly paste on both ends of the hammer spring won't hurt either.... When you reassemble, the hammer should fall easily under it's own weight.... Wink

While you have it apart, it wouldn't hurt to polish all the trigger contact surfaces to a high gloss (at least 800 grit), including the bottom of the front face of the hammer where the sear contacts.... DON'T change any angles, just smooth and polish and lube sparingly with moly paste or grease.... If you replace the trigger spring (NOT the hairpin style sear spring) with a lighter one (0.020" wire instead of 0.028") you will be rewarded with a much lighter trigger pull with a very nice 2-stage feel.... Cool

One word of caution.... unless the gun is completely degassed (ie at zero pressure) DON'T remove the screws retaining the valve or try and unscrew the front fill cap.... the results could be explosive (and painful if not deadly).... Shocked

Bob

Mark5043 · Silver Status Member

Okay,great tips Bob.Come to think of it when I had the Disco apart for the barrel swap,the contact surfaces were rather dry,and rough.I do make it a point to degas whenever I work on it.Once years ago,I had a black powder burner blow up on me..... EyesWideOpen

Got lucky,and just got a set of numb,and bruised hands.Point being,that experience has always stuck with me,and I ALWAYS get the info I need,before I do something questionable.

Thanks,
Mark