HomeFlintlock Workshop 3D Printed M4 Adapter For Toystar K-1A & K-7Material: ABS by 3D PrintedOnly Fit To Toystar K1A & K7 (not fit to K2)Flintlock Workshop 3D Printed M4 Adapter For Toystar K-1A & K-7SKU: FLW-M4ADAPTER-K1AK7$42.50PriceQuantityAdd to Cart