1.The FAST FTC Magnifier Mount Is Compatible With The Following: G30, G23, G33, G43, G45,Mirco 3X, Mirco 6X Etc. 2.This FAST Mount Hangs The Magnifier Upside Down So As To Not Impinge The Adjustment Knobs On The Host Receiver. The Upside Down Position Of The Magnifier Does Not Impact The Function Or Performance Of The Unit,Foldable Arm For Magnifier Allows Flexible Use Of Holographic Sight Alone Or With Magnifier, Reducing Risk Of Damage. The FAST FTC Magnifier Mount Is Compatible With The Following: G30, G23, G33, G43, G45,Mirco 3X, Mirco 6X Etc. 3.FAST FTC Magnifier Mounts Come With QD Auto-Lock Lever. The FAST FTC Magnifier Mount Is Built From 6068-T6 Aluminum And Type III Hardcoat Anodized Black Or FDE. In The Structural Components That Come Into Contact With The Guide Rail, We Use Steel , Which Ensures The Best Stability And Durability Of The Product. Unlike Others Who Use Aluminum For This Component, Aluminum Tends To Deform After Multiple Assemblies.