Lyman 66 Receiver 'Peep' Sight 66LA for Marlin 336. OpticsPlanet Inc is an Authorized US Distributor for Lyman Tritium & Fiber Optic Night Sights. Improve the accuracy of your hunting rifle with a 66 Receiver Sight. The 66 sight is designed for mounting on flat receivers such as lever action rifles like the Winchester 94 Marlin 336 or modern shotguns there's even a model for the SKS. Features include 1/4 minute audible click micrometer adjustments for elevation and windage quick-release slide coin-slotted "stayset" knobs and two interchangeable aperture discs (large hunting aperture and small target aperture) for any shooting condition. Specifications for Lyman 66 Receiver "Peep" Sights: Manufacturer: Lyman Fabric/Material: Aluminum Gun Type: Rifle Package Contents: Lyman 66 Receiver "Peep" Sights What firearm models does the manufacturer say Lyman 66 Receiver "Peep" Sights is compatible with? The manufacturer says that Lyman 66 Receiver "Peep" Sights is compatible with Winchester Model 1894 Marlin Model 336 Winchester Model 1886Lyman 66 Receiver 'Peep' Sight 66LA for Marlin 336