03-08-2017, 08:07 PM
Got a nice email from Magpul re polymer Grendel mags:
Thank you for contacting us, and sorry for the late reply. At this time we do not have plans to offer an AR15/M16 compatible PMAG for larger calibers such as the 6.8x43 SPC, 6.5 Grendel, or 7.62x39. The primary reason for this is due to the limited physical space inside of the standard M16 magazine well. In order to accommodate the increased case diameter of these cartridges, and the subsequent widening of the staggered cartridge stack, the walls of the magazine body would have to be dramatically thinned. This is not conducive to a robust polymer magazine design.
Thank you for contacting us, and sorry for the late reply. At this time we do not have plans to offer an AR15/M16 compatible PMAG for larger calibers such as the 6.8x43 SPC, 6.5 Grendel, or 7.62x39. The primary reason for this is due to the limited physical space inside of the standard M16 magazine well. In order to accommodate the increased case diameter of these cartridges, and the subsequent widening of the staggered cartridge stack, the walls of the magazine body would have to be dramatically thinned. This is not conducive to a robust polymer magazine design.