Sixmm Airsoft feature the KSV Modular M-LOK Rail system for the Krytac Kriss Vector AEG made by Angry Gun. This is a black, metal accessory weighing 350g. Its primary function is to expand the available space for attaching additional accessories, such as lights, lasers, and grips, to the weapon.

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.