The LC8 launching cup has two basic purposes. One is to be a launching cup for the 82 Series Launched grenades, and the other is to be a stand-off for the Model 2570 Door Breaching round. The LC9 Launching cup is designed to launch any of our 92 Series rubber ball grenades, with the use of the Model 2600 Launching Cartridge. OPERATION: These can be fired from most 12ga smoothbore shotguns such as the Remington 870 and Mossberg 500. SPECIFICATIONS: LC8: Overall Height-8" (203mm), Diameter-1.52" (38.6mm) LC9: Overall Height-7.2" (183mm), Diameter-3.4" (86mm)