Additional Service: Full Auto Upper Relief Cut Machining$14900 SKU: 416UPRCUT-1 Category: hide-from-search Product ID: 7497 For making your semi-auto upper compatible with post sample and transferable machinegun lowers. Additional Service: Full Auto Upper Relief Cut Machining quantity Add to cart Description Additional information Description For making your semi-auto upper compatible with post sample and transferable machinegun lowers. Additional information Weight 16 oz Dimensions 8 × 23 × 3 in Related products Sale! HK UMP 10mm Conversion Kit Bolt and Barrel from: $69900$49900