These extended magazine boxes are built to allow longer bullet seating, and thus a longer than standard overall cartridge length. Length is increased by approximately 0.110". Installation requires alterations to the receiver, bolt stop and ejection port.
Box extends overall length of the cartridge approximately .110"
Outside length 3.890", inside length 3.810"
Requires gunsmithing/fitting for installation
The statements and opinions expressed within Customer Reviews reflect each author's personal perspective and do not imply endorsement by MidwayUSA, its Employees or any other organization. Customers should in no way infer that MidwayUSA has validated review information as safe, accurate or appropriate.