Go compact with the Moriarti 8" 5.7x28 AR-15 Complete Upper, built around a 4150 CMV 5.7x28 barrel and designed for compatibility with a standard AR-15 lower or compatible CMMG Banshee lower.
The 8" nitride-finished barrel features a 1:9 twist and 1/2x28 muzzle threads, finished with a mini slip-over compensator. A 7" free-float M-LOK handguard with an integral handstop creates a compact front-end configuration, while the billet slick-side upper keeps the receiver streamlined.
This complete upper includes the nitride-coated 5.7x28 BCG and charging handle.
| Specification | Details |
|---|---|
| Platform | AR-15 / CMMG-Compatible |
| Caliber | 5.7x28mm |
| Barrel Length | 8" |
| Barrel Material | 4150 CMV |
| Barrel Finish | Nitride |
| Twist Rate | 1:9 |
| Muzzle Thread | 1/2x28 |
| Muzzle Device | Mini Slip-Over Compensator |
| Upper Receiver | Billet Slick Side |
| Dust Cover | Included |
| Handguard | 7" Free-Float M-LOK |
| BCG | 5.7x28 Nitride – Included |
| Charging Handle | Included |
| Lower Compatibility | Standard AR-15 / Compatible CMMG Banshee |
| Lower Receiver | Not Included |
This 8" 5.7x28 upper fits a standard AR-15 lower or compatible CMMG Banshee lower. Use the appropriate 5.7x28 magazine system for the selected lower configuration.
What is the advantage of an 8" 5.7x28 AR-15 upper compared with a 16" 5.7 upper?
The 8" 5.7x28 upper provides a substantially shorter and more compact configuration than a 16" upper. This model combines the 8" barrel with a 7" M-LOK handguard while retaining compatibility with the appropriate AR-15 or CMMG Banshee lower setup.
Images may not be the exact representation of the product. Component appearance, rail design, finish and other non-material details may vary based on production and availability. Please refer to the product description and specifications for the configuration included.