Airsoft Masterpiece LimCat WildCat 6" (Type 1) Standard Slide - Silver Colt M4A1 this design of frame

this design of frame

Guarder Steel Disassembling Latch is suitable for Tokyo Marui M9 / M92F Series AEG  Constructed by SQ-Coating Surface Finish Technology  Please note that installation requires experience working with GBB

Each rifle includes one 4" rail with a QD point and two 2" rail segments and can be installed via the included rail backing plates and mounting screws

It also clocks in at a round 440 fps which is way too high

Airsoft Masterpiece LimCat WildCat 6" (Type 1) Standard Slide - Silver Colt M4A1 this design of frameProduct Brand: Airsoft Masterpiece Product Code: SK LCWCCR 6 Weight: 240g Length: 223. 0mm Material: Aluminum