Product Description

The CMMG RESOLUTE Upper Group (57B40E4AB) is a complete AR-platform upper assembly chambered in 5.7x28mm, built to deliver personal-defense-weapon (PDW) ballistics in a balanced, carbine-style format. Featuring a 16.10-inch barrel and an Armor Black finish, this upper uses an M-LOK free-float handguard for a rigid, accessory-ready setup. It’s designed to pair with an AR-15 lower (with the appropriate 5.7 conversion magazines) or compatible CMMG lower options, making it a versatile upgrade for range use and defensive-ready builds.

Product Highlights

• Complete CMMG RESOLUTE upper group for AR-platform builds in fast, flat-shooting 5.7x28mm.
• 16.10-inch barrel for carbine handling with PDW-style performance.
• M-LOK free-float handguard for stable accuracy potential and flexible accessory mounting.
• Armor Black finish for a clean, durable appearance across the upper and handguard.
• Configured for AR-style compatibility, ideal for upgrading an existing lower receiver.

Specs

• Brand: CMMG
• Model/Series: Resolute (Upper Group)
• Caliber: 5.7x28mm
• Barrel Length: 16.10 in
• Platform/Fit: AR-Platform (AR-Style)
• Handguard: Free-float M-LOK
• Finish/Color: Armor Black
• UPC: 810097504318
• Manufacturer Part Number: 57B40E4AB

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