These parts would cost you $20.00 from other sellers---we bought big---you save! These fit the long pinion 8-36 threads. If you have one of the lock bar sight assemblies missing the lock bar, spring, and detent (nut) here's a good deal that will allow you to complete the sight. These are new current production parts that function same as original. These are sold as a "bundle" so enter 1 in cart and you the three parts in the pic. We can only ship and take orders from and address in the United States. CLICK ON PIC FOR A BETTER LOOK