The Thompson Center® Adjustable Hinge Pin is the hardened steel, 100% adjustable hinge pin that tightens your gun barrel to the frame, allowing for increased accuracy with all T/C® Encore™ Rifles. The Hinge Pin has the advantage of an oversized pin without the potential for damage, and requires no modification to your gun or your forend. Simply slip it into the hinge pin hole as you assemble your Encore™ frame and barrel. Lastly, use the two Allen wrenches included to tighten the pin and lock it into place. Increase the accuracy of your Thompson Center® Encore™ with the addition of the durable, adjustable hinge pin.