For Marlin Pistol or Large Caliber firearms, Midwest Industries has the best way to accessorize! One Piece Picatinny Scope Rail 5" overall length Constructed from Hard Coat Anodized 6061 Aluminum for a lifetime of service Includes mounting screws Made in the USA Lifetime warranty HX4 Specs: Works with Henry 38/357, 44 Mag, and 45 Colt receivers Weight: 1.6oz HX5 Specs: Works with Henry 30-30, 45-70 rifles, & Henry Homesteader 9mm Weight: 2.8oz Mfg: Midwest Industries