Bravo Company MFG MK2 Recoil Mitigation System Mod 1 - T2 5.6oz 7075-T6 Aluminum Hard Coat Anodized Black. PLEASE NOTE: because of the MK2's longer length some Mil-Spec stocks may not completely collapse closed all the way up to the M4 Lock nut. Specifications for Bravo Company MFG MK2 Recoil Mitigation System - Mod 1: Manufacturer: Bravo Company MFG Color: Black Finish: Hard Coat Anodized Fabric/Material: 7075-T6 Aluminum Condition: New Features of Bravo Company MFG MK2 Recoil Mitigation System - Mod 1 Lessens felt recoil without compromising reliability Provides a more consistent carrier velocity which can aid in accuracy reliability over conventional carbine buffer system Increased internal counterweight travel reduces bolt bounce Internal spring to reduce noise of counter weight shifting and ensure more consistent weight placement Mil-Spec M16A4 rifle spring with more spring coils than M4 carbine increases consistency and widens operating envelope Buffer made of 7075T6 aluminum hard coat anodized for lasting endurance. Comprised of Mil-Spec components Package Contents: Bravo Company MFG MK2 Recoil Mitigation System - Mod 1 Bravo Company MFG BCM-MK2RMS-M1T2: MK2 Recoil Mitigation System Mod 1 - T2 5.6oz 7075-T6 Aluminum Hard Coat Anodized Black