In Eric Rohrbaugh's still photos of assembly and he uses a pair of Channel lock pliers to compress the recoil assembly for placement. Like everyone else, I thought at first this was horrifying. As expected, it work very nicely. A very nice version of the channel lock plier used by Eric is the Knipex "Cobra", available at hardware stores and, of course, on line. The smallest, 6", version is very nice for this task. I find that the jaw setting one step removed from maximum opening works well. If one is worried about the jaw scratching the stainless pieces of the recoil assembly, take two pieces of electrician or other tape clamp between the jaw and trim to size. This provides a polymer surface against the SS steel pieces of the recoil assy.