When modularity, affordability, and quality are all important the Mk4 T is the upper of choice. The Mk4 T introduces CMMG's RKM series of KeyMod free float hand guards. This upper sports an 11" RKM hand guard and a nitrided 4140 CrMo steel barrel in a medium taper profile.
| Caliber | 300aac blackout |
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| Barrel Finish | MATTE BLACK |
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| Rate Of Twist | 1:7" |
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| Ar15 Accessory | Y |
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| Other Features | CMMG RKM11 KEYMOD FREE FLOAT HANDGUARD, MEDIUM WEIGHT TAPER BARREL, COMPLETE UPPER-INCLUDES BCG, AND CHARGING HANDLE. |
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| Barrel Material | STEEL |
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| Other Features2 | ALUMINUM UPPER RECEIVER |
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| Barrel Length In Inches | 16 |
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Determined at checkout.
