Came out of my old KWA SR10. The marks on the top are from me having to shave a bit down to get it to close correct (second picture shows that it closes fine). Comes with ball bearing spring guide needed for the gearbox as well as the stock cut off lever and stock ball bearings (8mm or 9mm I forget). Price is $25 shipped to the lower 48 if you cover PayPal fees! PAYPAL ONLY!! If you go through HopUp it’ll be $30 sorry not sorry