The CARVER Magwell is a LARGE aluminum magwell for your Glock that adds the largest opening of any other magwell, a full 1.5 inch by 2.375 inch long width. That equates to 3.56 square inches to funnel your Glock magazine into your Glock for lightening fast reloads. This mount is made exclusively by CCS Machining, Inc. in Greensburg, PA exclusively for B&B Enterprise. This magwell fits G20 and 21 Gen1-3 Glock models. Does not fit SF models.
If you want a full-on competition magwell, the Carver Custom is one of the best. Secured to the gun in two ways, the Carver uses a brass mounting point (basically a miniaturized Seattle Slug) to provide weight where you need it.