5.7 x 28mm Upper Receiver, BCG, 8″ barrel & 32 Round Magazine

New to the lineup is our 5.7 upper receiver with:

• F5MFG Upper Receiver
• F5MFG Handguard & Barrel Nut
• Radial Delayed Blowback™ Operating System
• 8″ barrel
• 32 Round CMMG Magazine