Focus Wheel for Primary Arms Optics Scopes - Parallax Adjustment Knob for Rifle Scopes | Precision Shooting & Hunting Accessories | Perfect for Long-Range Target Practice and Tactical Hunting

So, you could snag a 4" aluminum focus wheel from Scope-Werks for a cool $100. Or....pick up this bad boy for all of $15. Seriously, there's nothing special about a focus wheel. However, they play an important role. Focus wheels allow the shooter more surface area to grab and increased leverage to fine tune the target focus, which all but eliminates parallax. Reducing the number of variables to worry about (such as parallax) increases consistency. In the words of Ryan Cleckner, "consistency is key!" The folks at MK Machining know that accessories like this little fella do not need to be constructed from space age alloys injected with concentrated unicorn semen by a secretive craft guild in a level 4 clean room. It's a simple focus wheel. Nothing more.I've seen some comments from others that claim that polymer products have no place on a "precision" weapon and will break under moderate stress. Here's my response to those claims: if you find yourself in a situation that resulted in the breaking of a polymer side focus wheel, you have bigger problems to worry about.In summary, $15 is less than $100. Like a lot less. It fits perfectly. It's not fancy or pretty or made from rare earth metals. It works exactly as one would expect.