The Wilson Combat One-Piece Bullet Proof Magwell/Mainspring Housing is CNC Machined from a solid billet of hardened tool steel and can be seamlessly fitted to any standard 1911 frame with the largest magazine well opening possible. Available in a variety of popular grip options, this new part is the toughest magwell on the market with a large internal opening that ensures that you never miss a reload again. The low-profile, radiused contours are legal for competition and ideal for carry guns and perfectly machined 30 line checkering matches most fine custom handguns and will resist snagging your concealment garment.