Home / Services HK USC to UMP / HK UMP/USC Picatinny Optic Top Rail Trade In You cannot add "HK G36 Picatinny Handguard Accessory Rail Set" 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 Out of stock HK UMP 4 Position Lower Housing Grip Frame Trigger Group 0 1 2 F $89900 Out of stock SL8 Old Style Top Rail Factory HK $24999 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 Original G36 Complete Full Auto Bolt Group from: $59900