Overtravel adjustment screw for Gamos with GTX trigger?

Quite possibly! So far, testing with my Big Cat has been very positive. If you have a Gamo with a GTX trigger installed and still have the original factory trigger adjustment screw and plastic block you may be on the way there, too. First thing to check is to make sure the plastic block does not interfere with the transfer bar or trigger. This is fairly easy as the block will probably fit a little loose in the trigger housing. Move the trigger and watch the block. If it does not move you are probably OK. Next thing is the screw. The original screw worked in my BC, but I replaced it with a socket head screw the same size, 3mm X 6mm. The extra thickness of the socket head allows more threads in the block. I also used a toothpick to put a small drop of rubbery craft glue in the hole in the block to help hold adjustment(poorman's Vibratite!). A good place to start adjustment is with the screw head about 1mm or so above the trigger housing. Make sure the screw does NOT extend out the other side of the block or it could interfere with the transfer bar and thereby change your trigger adjustment. Head for your favorite shooting lane to adjust. WARNING: These adjustments are made with the AG loaded to prevent dryfire and possible internal damage so please be careful!!! Cock and load (to prevent dryfire) your AG and test trigger. If it fires, turn the screw counterclockwise 1/4 turn at a time until it does not fire. Then make 1/8 or smaller turns clockwise until it fires again. If it doesn't fire to begin with, start with 1/8 or smaller turns clockwise until it does. EDIT: Please be extra careful during this process as the sear can be in a near fire position and the slightest thing could trip the sear causing the gun to fire. After further testing, once you reach this adjustment because of the fine threads on the screw I recommend giving the screw a 1/4 turn or more clockwise to help prevent a misfire and for safety. End of edit. Test for repeatability, I did have a couple of occasions where it slipped adjustment for some reason and wouldn't fire. Easy fix, just turn the screw clockwise a little. This mod works because the back of the GTX blade is solid. Unfortunately, I didn't have very good results with the factory trigger blade. I don't know if this mod will work with the Gamo clones as the BC is the only AG I have that uses the GTX. Perhaps some of you will test that for the rest of us and let us know what you find. This may or may not work in your Gamo, but so far it is working like a charm in my BC.
Good luck & safe shooting!!

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