I purchased this throw lever from Larue Tactical and never installed it. I paid $70. for it and I’ll let it go, shipped to your USA address for $50. Postal money order or discreet Paypal. A good description is as follows: Charlie Drissel Cat Tails are custom designed and are CNC machined from 6061 T6 Aluminum. The finish is Type II Class 2 Black Anodize per MIL-A-8825 by Ximpak, Inc. called Type III Black Hard Coat Anodizing. The two screws are standard 4-40 (1/4") Socket Head Cap Screws. For any answers to questions not addressed in this ad, please refer to either of the following web sites. http://www.laruetactical.com/cat-tail-–-nightforce-nxs-compact Charles Drissel - Brian Enos's Forums... Maku mozo!