Magnum Research Desert Eagle Mark XIX Features The entire Mark XIX Component System is based on a single platform. With its gas operation rotating bolt and all-steel construction this is the heart of the firearm. Once you ve purchased a Mark XIX Desert Eagle Pistol you can change the caliber in seconds if you have the appropriate Mark XIX components on hand. The Magnum Research Mark XIX Desert Eagle .50 A.E. pistols are convertible to the .44 Magnum by simply switching the barrel and magazine (can be done in seconds!). For converting to the .357 Magnum you need to switch the bolt assembly barrel and magazine (takes a few minutes). DE50 (.50 AE Pistol with 6 Barrel Black 7 Round Magazine) Magnum Research Desert Eagle Mark XIX Specifications Action: Semi-auto Barrel Length: 6 Brand: Magnum Research Firearm Capacity: 9 Gun Model: Desert Eagle Model Series: Mark XIX DE50 (.50 AE Pistol with 6 Barrel Black 7 Round Magazine) BAR446 (.44 Magnum 6 Barrel Black) BAR3576 (.357 Magnum 6 Barrel Black) .357 Magnum Bolt Assembly MAG44 (.44 Magnum 8 Round Magazine) MAG357 (.357 Magnum 9 Round Magazine) Shipped in Protective Lockable (locks not included) Aluminum Case