This is a low & middle mount for the S&T Tavor. This is a top rail with a step designed to accommodate laser devices. Not compatible with ARES or KSC Tavor. As this is made with a 3D printer, adjustments may be necessary. ※The main unit is not included This product is made with ASA filament. The advantages of ASA filament are as follows: ・Excellent UV stability (ideal for outdoor use) ・Robust and durable ・High impact and temperature resistance ・Excellent chemical and water resistance