| Platform | Mk4 |
| Caliber | 5.56x45mm |
| Operating System | Direct Impingement |
| Barrel Length | 16.1 |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Barrel Twist | 1:7 |
| Muzzle Device | A2 Flash Hider |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Mid |
| Gas Block | 0.750 Non-Adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | CMMG EML15 M-LOK |
| Finish | Cerakote |
| Charging Handle | CMMG Mil-Spec |
| Pistol Grip | Mil-Spec A2 |
| Buffer Type | Carbine |
| Receiver Extension | CMMG 6 Position |
| Stock / Brace | CMMG M4-Style Buttstock |
| Trigger Type | Mil-Spec Single Stage |
| Trigger Guard | CMMG Mil-Spec |
| Safety Selector | CMMG Mil-Spec |
Expected to ship within 15-30 business days. AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
AR15 Builder's Kit, 5.56mm, 16.1"
Includes:
- Upper Group, RESOLUTE, Mk4, 5.56mm, 16.1"
- Mil-spec Charging Handle, AR15
- M16 Bolt Carrier Group
- AR15 Lower Parts Kit
- M4 Buffer tube and stock kit (Carbine Buffer)