Army has already sent out the request for 6.8x51 conversion kits for the M240 series...
I will see if I can find one for the M134 Minigun.
The conversion kit should include all hardware and instructions needed to modify a standard M240B and/or M240L to fire the 6.8mm ammunition. This will include a new barrel assembly and may include changes to the weapon powering through updates to the gas regulator, drive spring, or other means. The barrel assembly may be either of the standard barrel length (M240B) or short barrel (M240L). Information on 6.8mm ammunition type, specifications, and availability should be provided.
So. It's true, goodbye 5.56 AND 7.62
I will see if I can find one for the M134 Minigun.
SAM.gov
sam.gov
The conversion kit should include all hardware and instructions needed to modify a standard M240B and/or M240L to fire the 6.8mm ammunition. This will include a new barrel assembly and may include changes to the weapon powering through updates to the gas regulator, drive spring, or other means. The barrel assembly may be either of the standard barrel length (M240B) or short barrel (M240L). Information on 6.8mm ammunition type, specifications, and availability should be provided.
So. It's true, goodbye 5.56 AND 7.62