Samson Aluminum Picatinny - 18 inches. These Samson Picatinny Rails feature a plated finish so that they will not rust and can be used with any weapon that has a Picatinny rail. Samson 's Samson Single Toasted Rails work on every major firearm and work with most handguns that have a Picatinny rail. They can also be used on many fixed mounted targets such as AR-15 rifles and shotguns. These Samson Picatinny Rails have an overall length of 18" and 9" and come in two lengths. The 18" Samson Picatinny Rail has a finish of nitride which prevents spotting from dust and debris such as mud and dirt. Samson 04-06002-00: Aluminum Picatinny - 18 inches