Sixmm.com features the Maddog MK18 10.5" MLOK Rail for M4/M16 AEG, GBB, PTW, and MWS airsoft rifles. This lightweight rail features a simple design for easy installation and removal. Made of metal and finished in Flat Dark Earth, the MK18 rail weighs approximately 360 grams and is compatible with various M4/M16 airsoft rifle models.