Flintlock Workshop Type 89 JSDF AEG Japan Version Custom Specification:Rail hand guard, Silver Cable And Battery Storage Inside M4 Tube, SRC Hop Up Chamber Set, Well Full Tuned Gears CustomStandard Specification:Ver 8 Metal Gear Box with semi-auto, 3-round burst mode (Mechanical Burst) and full auto function (ア = Safe, レ =  Full Auto, 3 = 3-round burst, タ = Semi auto)Adjustable Hopup system.Comes with adjustable rear sight.Plastic made Fixed Rifle Stock0.6JIncluded 300 rounds Type 89 style Hi-cap Magazine.Compatible with most of the TM M4 style magazines in the market.