Product Description The CMMG DISSENT MK4 complete upper receiver is built to modernize an AR-platform pistol or SBR build by moving the recoil assembly into the upper receiver for a compact, buffer-tube-free setup. Chambered in 300 Blackout with a 10.50 inch barrel, this upper features a forward, non-reciprocating left-side charging handle for fast manipulation while staying on target. Finished in Armor Black, it comes equipped with a CMMG Zeroed Linear Compensator, a 9.60 inch M-LOK handguard for accessory mounting, and a 1913 Picatinny rail end plate that replaces the traditional buffer tube interface. Product Highlights Compact DISSENT design houses the action and recoil assembly in the upper receiver for reduced bulk versus traditional AR setups Forward non-reciprocating left-side charging handle supports quick, efficient operation 300 Blackout 10.50 inch configuration with CMMG Zeroed Linear Compensator for a forward-directed blast signature 9.60 inch M-LOK handguard provides versatile mounting for lights, grips, and other accessories Includes 1913 Picatinny rail end plate for buffer-tube-free rear mounting options (where legal) Specs Brand: CMMG Model: DISSENT Series: MK4 Type: Complete upper receiver group Caliber: 300 Blackout Barrel Length: 10.50 in Charging Handle: Left-side (forward, non-reciprocating) Handguard: 9.60 in M-LOK Muzzle Device: CMMG Zeroed Linear Compensator Thread Pattern: 5/8x24 Receiver Material: 7075-T6 aluminum Finish/Color: Armor Black (Cerakote) Compatibility: Fits AR-Platform Included: 1913 Picatinny rail end plate UPC: 810097509115 Manufacturer Part Number: 30BC239AB Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.