Please note 15% restocking fee for buyers who neglect to precisely measure their pistols’ magazine well width. This listing is for THREE Magazines. Smith & Wesson’s 4000 series full sized pistols had two magazine well widths, .815 inch and .818 inch. Here are quality extended capacity magazines for the ones with .818 inch wide wells. They will not fit the .815 width pistols. They will fit all the 4013 double stacked pistols, and simply extend. Manufacturer is Mec-Gar s.p.a., of Gussago, Italy. They are modified by local machinists here in West Tennessee. Springfield Armory XD40 magazines with added release slot for the Smith & Wesson 4000 series pistols, including models 410, 411, 4003, 4004, 4006, 4026, 4043, 4044, 4046, and any TSW variants of those pistols.  One piece folded steel body with round count ports, steel spring and inner plate; and polymer follower and floorplate. Backs are full length tig welded and smooth milled, with AFC teflon anti-friction finish. Each magazine holds 13 rounds of .40 S&W ammunition. They will still fit the parent XD40 pistols. No modifications beyond the extra round port. 15% restocking fee for buyers who neglect to measure their pistols’ mag well width.

                        No CA CT DC HI MA MD NJ NY OR RI or WA civilians.  >> Free USPS Ground or $12 Priority. Robertson Trading Post, on Historic Front Street in Henderson Tennessee, in Elvisland, 90 miles east of Memphis and 75 miles north of Tupelo. We've been around here since 1952. >>> We don't trade grips, holsters, scope mounts, parts, or magazines unless there's a lot of them. >>> (California) WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to