Williams FP Receiver Sights have an internal micrometer for a click-at-a-time adjustment and are made from rust-free aluminum. The sight is marked with white tick marks for easy adjustments of both windage and elevation. Includes 1 aperture, which has an outside diameter of 3/8″ and an inside diameter (peep size) of .093″. The aperture is knurled for easy installation/removal. Comes with a durable blue-black anodized finish and weighs only 1-1/2 oz. Please note that some rifle receivers may require drilling and tapping for installation.Notes:Fits grooved receivers from .300 to .600″ in width
Rise Armament AR-15 Complete Upper Receiver 6mm ARC 18" Barrel 15" M-LOK Handguard Rifle Length Black
$999.00
Aero Precision AR-15 Barreled Upper Receiver 5.56x45mm NATO 20" Barrel A2 Handguard with Pinned FSB
$509.99
Williams Fool Proof Rear Peep Sight Air Guns, 22 Rifles with Dovetail Receivers and Low Line of Sights
$74.99 




