POLISH THE STOCK HAMMER,
its free and if you do it right and good it will be comparable or better than a VQ.
worst case scenario, you fudge it up and gotta buy a new one.
the clark custom 1022 customize video shows some other tricks to modify the gun.
i also made a bolt buffer from rubber tubing, im not sure how the aftermarket ones work. but i cut a piece of tube to size, then a length-wise cut, to leave a 2mm opening, and clamp it over the metal bolt stop.
NOTE -- my tubing was undersize, 5/32 ID, so the correct size tube might work better, or differently.
dont know if it makes a difference in the guns performance or if i even needed it at all, but what the hell. it seems to stay on pretty good too.
i also thought about doing the same thing with the rubber tubing, but glueing it on the back of the bolt.