This product has been discontinued. Click here for a similar, higher quality alternative. TSD Combat M4 RIS AEG Features: Electric Blowback Functional Bolt Catch & Release Full Metal Body, RIS, Outer Barrel & Magazine Tactical LE Stock with accessory compartment & Stock Shock Absorber Pad FPS: 350-380 w/ 0.20g Internals: Pre-Upgraded Metal Gearbox Rate of Fire: 720 per min Fire Modes: Full Auto / Semi / Safe Hop-up: Adjustable 7mm Bushings: POM Nylon TSD 30-Day Warranty Battery & Charger Not Included, Battery & Charger Not Included, recommend Mini Battery to fit in RIS handguard. Compatible batteries and chargers: ERBAT24, ERBAT13, ERBAT3, ERBAT32, ERBAT34, ERBAT6, ERBAT9 & Small Slow Charger or Universal Smart Charger. Also included are 1-300rd hi-cap magazines, RIS Handguard, & Recoil Shock Absorbing Pad. Battery & Charger Not Included. We recommend TSD .20g BBs or higher.