Selling a custom kwa sr10/mk12. Gearbox is mostly stock except for a guarder piston, m120 spring, Prometheus shims, general gearbox tune up, shs ht motor, deans conversion, and gate merf mosfet. Also has maple leaf bucking. Magpul ubr stock and magpul grip. Optic not included. Buyer pays shipping and PayPal fee. No trades