These are rare and collector magazines. They are new uncut Guide Lamp M3 Grease Gun mags. They are parkerized and have the Cobray stamp as well as the original Guide Lamp engraving. These will work in your M10/45, MAC-10/45 guns that are already set up for uncut mags.
NOTE: This magazine is not available for sale in the following states/areas: CA, CO, CT, DC, MA, MD, NJ, NY, and Chicago. If you purchase this magazine and reside in a magazine restricted area that prohibits us from sending this magazines to you, we will issue a refund via check minus the 3% credit card fees we incur.