UPPER GROUP KIT, RESOLUTE™ 100, MK4, 6.5 GRENDEL, 1 10RD MAG
Quickly convert your AR15 into a hard-hitting 6.5 Grendel by using CMMG’s RESOLUTE 100 Mk4 upper group kit. Each kit comes with a RESOLUTE 100 Mk4 upper group (with 16-inch barrel) and one 10-round 6.5 Grendel magazine. Simply pair the upper receiver with your existing AR15 lower, and use the supplied magazine to safely feed 6.5 Grendel ammunition.
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