Features: Lightweight M4 GBBR Refreshed CQB Length Short M-Lok Rail with Blast Shield Muzzle Device. Snappy Recoil. Comes with a 30 round gas magazine. Specifications: Length -660mm Weight - 2668g Magazine Capacity - 30 Rounds Power Source - Green Gas / Propane Blowback - YES Shooting Modes - Semi / Full Auto Hop-up - Adjustable. Magazine Compatibility - KJ Works M4 GBB Magazines. FPS - Approx 400 This KJ Works M4 GBBR is a face lifted, refreshed version of the KJ M4 GBBR. This particular rifle is light weight and designed to be CQB length. The rifle itself comes in a handsome two tone with the stock and rail being a tan/fde color. To cap it off, the rifle features a blast shield style muzzle device and flip up front and rear sights. The system of this M4 GBBR is designed for optimal gas efficiency and provides optimal recoil impulse. The trigger is a little bit on the lighter side and the reset is soft but felt. Includes: x1 KJ Works Full Metal M4 RIS Airsoft GBB Rifle x1 30 Rnd Magazine. x1 Loader. x2 Manual.This product is only compatible with gas designed specifically for Airsoft guns. Do not use lighter fluid or butane gas, as that will cause permanent damage.