Product Description Features: LIMITED TIME DEAL: FREE ECHO LIPO WITH EACH PURCHASE Nylon fiber body with some metal small parts Quick change spring gearbox Metal flip up sights Blade trigger Classic Army ECS - program fire modes on the fly using the trigger and selector (semi, full, 3-round burst, 5-round burst) MLOK rail system (2pc. MLOK rail segments included) Wired to Small Tamiya connector 6.03mm Tight bore barrel Rotary hop up chamber Crane stock Specifications: Caliber: 6mm Power Source: Electric/Gas Muzzle Velocity w/0.20g BB: ~330-360fps (100mps) Muzzle Energy w/0.32g BB: Hopup: Adjustable Lipo Ready: Yes* (Recommend panel Lipo, no greater than 25C discharge) Battery Location: Stock Recommended Battery: 9.6v NiMH OR 7.4v or 11.1v panel LiPo Fire Modes: Safe/Semi/Full-Auto/Burst Programmable* Length: 800-880mm (stock extended)/ 31.5-34.7in Weight: 2.3kg/5lbs Magazine Type: M4 compatible Magazine Capacity: 120 mid caps, 300 round high caps, etc. Package Includes: 1 x 300 round high cap magazine, manual, cleaning rod, flip up sights, Lipo 7.4V 1450mAh 15C battery Product Warranty: No warranty, no returns, no exchange Construction: Nylon fiber Barrel Thread Type: -14mm (counter-clockwise) Hopup Chamber: large dial plastic chamber (located in the ejection port) Bucking: Standard Classic Army bucking Gearbox Type: Version 2 CA ECS, quick change spring guide Gears: Version 2/3 compatible Bushing Size: 9mm bearing/bushing combination Piston: Polycarbonate piston with 7 metal teeth, polycarbonate ported piston head Spring: ~M100 Motor Type: long type Wire Harness: standard wire/silver corded wire, MOSFET/microswitch trigger Plug Type: Small Tamiya type Inner Barrel Type: brass 6.03mm tight bore barrel, standard AEG cut Inner Barrel Length: 363mm WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov/product Customer Reviews