This is a cut and paste (slight edit and aditions) from my post in the "Mods and Repair" section. I figured this info would be at home in here...
I have to say that the G1200 is a very nicely designed and built rifle. One can open it up and work on it without parts flying all over. Everything is well laid out and appears to be made out of quality materials for a long service life. The pump return spring actually has a tension preload adjuster built in, it's as if Gamo wanted you to open it up and tinker inside! It is nearly an all metal build with the feed plates, barrel shroud/front sight and trigger being the obvious plastic bits. The valve is very similar to a Crosman unit and one could possibly be modified to fit if the need arose (non existent parts supply from Gamo).
My only nitpicky issues with this thing are that the feed shuttle is plastic and could be the first part to wear (it could also outlast the steel parts depending on the type of plastic its made from). The shuttle linkage is long and potentially fragile. If one were to really haul off on the pump during a feed jamb I could foresee something breaking. It seems that double pumping can cause feed jambs (the reason I first took mine apart). The trigger is plastic with metal inserts for the contact points and has a "mystery" linkage arm that serves (as far as I can tell) to cause the hammer strike to be limited and makes the trigger jump against your finger when fired. This linkage does not seem to effect performance when removed other than increasing velosity and/or gas usage.
The gun does seem to suffer from valve/CO2 cart chill over 10+ shots resulting in a noticeable sound decrease if one continues to fire (I'm going to have to get the chrony out for some tests). A bulk feed of some sort would be a wise mod for those who like rapid fire.
Accuracy seems good. I am a horible shot so I don't really feel qualified to coment other than I can shoot this gun as well as my long barreled 22XX's and my CZ631 in the short 10M I have available in my basement.
I expect that pellet choice is limited to mainly wadcutter pellets as with any inline magazine gun. Copperhead WC feed well in mine so I am happy to be able to shoot cheap ammo available at Canadian Tire.
My gun has been modified by a previous owner so shot count and velosity are likely not at the factory specs of 60 shots @ 150m/s.
The final problem I have with this gun is similar to the complaints most people with repeaters have... I can't load pellets in fast enough and I'm running out of pellets and CO2
This is IMHO a fantastic airgun for the money and anyone who has been thinking of picking one up can't go wrong. Sniper, I hope you still have some of these things left. Some sort of repeater rifle should be on every ones gun rack and these are really nice non-PAL plinkers.
MB
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