12 Gauge Deluxe Shotgun Heat Shield w/ Ghost Ring Sights - Constructed of High Strength Steel With Matte Black Powder Coating - CNC Machined Ghost Ring Sights - Positively Locks Behind Forward Barrel Lug - Infinitely Customizable Stop to Prevent Any Movement While Firing - Fits With or Without an Aftermarket Mag Extension - Limited Lifetime Warranty - Manufactured in the USA - Fits: Many 12 Gauge Shotguns - Does not Fit: Vented Rib Barrels - Note: The Barrel Lug Must Be At Least 13.75 Away from the Receiver for the Heat Shield to Fit. (Measure from End of the Receiver to Beginning of the Barrel Lug.)