JP Oversized AR-15 Anti-Walk Pins remove the possibility of sloppiness in the hammer, trigger, pins and the receiver. Get the most out of your weapon by taking the inconsistencies out of the equation. This set of 2 pins are oversized pins to replace the small 0.156 pins. The retainer screws are constructed of stainless steel and have a matte black finish. Make sure all of your parts are corrosion resistant to prevent damage to your weapon. There are no modifications necessary to your weapon, however, keep in mind that the trigger and hammer may have to be reamed for a perfect fit. Take care when stripping your lower receiver.