Features:Increases Reliability in ALL 1911 PistolsAircraft Grade Certified Stainless Steel Tube Resists CorrosionThe ETM has the Strongest Magazine Tube Yet Developed, Virtually Eliminating Feed Lip Cracking, Tube Spread and Cracking and General FatigueRefined Radius for Each Bend in the Tube to Take Advantage of the Strength in the Stainless SteelProprietary, Custom Designed Welding ProcessProprietary Multi-Step Tumbling and Finishing Process Provides Smooth Follower Operation and Insertion into the WeaponObservation Slots Moved to the Rear of the Tube, Located Exactly Where They Need to be to Maintain the Structural IntegrityInnovative Follower Design With its Extended Skirt Ensures Stability in Operation and Minimizes Creep from the Tube when the Magazine is EmptyFiber-Fill Nylon Self-Lubricating Follower Provides Smooth Round FeedingPositive Slide-Lock After the Last Round has been FiredSpace-Age Stainless Steel Spring Wire is Phenomenal for Spring LifeThe ETM Seats and Locks in the Weapon with the Slide DownRemovable Base Pad for Easy Maintenance and Versatility with Different Base Pad Options