Home / Services HK USC to UMP / HK UMP/USC Picatinny Optic Top Rail Trade In You cannot add "HK G36 30 Round Factory Magazine New" to the cart because the product is out of stock. HK UMP/USC Picatinny Optic Top Rail Trade In$3900 SKU: UMPRLTOP01 Categories: Services HK USC to UMP, UMP G36 Tags: UMP, usc Product ID: 4275 Picatinny/1913 accessory top optic rail for HK UMP and USC. High quality aluminum, black anodized, with screws. Fits HK UMP and USC as well as in spec clones. PD Trade in/Used Rail Black Anodized Aluminum Product is out of stock Notify me when this product is back. Please enter a valid email! Subscribe Description Additional information Description Picatinny/1913 accessory top optic rail for HK UMP and USC. High quality aluminum, black anodized, with screws. Fits HK UMP and USC as well as in spec clones. PD Trade in/Used Rail Black Anodized Aluminum Additional information Weight 2.5 oz Dimensions 7 × 1 × 1 in Manufacturer Black Ops Defense Related products Sale! HK Sling For UMP G36 SL8 USC Etc Open Bag $3500 Original price was: $3500.$2900Current price is: $2900. Out of stock HK Factory SL8 Metal Top Rail $7500 Out of stock HK G36C Length Modified SL8 Factory Barrel Assembly $59900 Out of stock Tan Polymer HK Vertical Grip 416A5 G28 MLI RAL8000 $4900