Unless your barrel installation and or bolt gap/cocking tube gap are fubar'd, I can't see you needing an entire kit. It probably would depend on what you want to spend for the FCG/trigger pack. You can either buy them as a complete assembly, or demil a CETME group from a kit. Add a buttstock assembly, and it looks like you're ready to go. As for the kits, Apex Gun Parts, SARCO, Century, among others come to mind as having kits for sale...in the $100-$150 range. I buit mine out of a SARCO kit, and have an Apex kit demilled and waiting to be built. They both looked pretty decent, once the wood was refinished and the metal re-coated.