Product description Lancer Tactical GBR Spring Powered Impact Airsoft Grenade 1 Dimension drawing Length：5.25" Height：1.97" Width：2.2" Weight：142g Features 1 Spring-powered grenade "explodes" upon impact and reusable, eliminating the need for CO2, propane or green gas Simple design for easy use - unscrew the tactical grenade cover, pour BBs into the grenade, screw the cover back on, and pull the pin when you're ready to lob it at your opponents Compatible with water gel BBs and other projectiles 5 to 8mm in diameter (5 seconds reset) after pulling the safety pin. Features 1 Wide spread and range with 6mm BBs, with a maximum capacity of approximately 130 rounds BB grenade "explodes" when impact is made after pulling the safety pin (5 seconds reset)