BCM MK2 Buffer System

The BCM MK2 Buffer System is a significant improvement over your run-of-the-mill carbine system. The MK2 features a longer receiver extension and a longer buffer while utilizing a standard rifle-length action spring. But why does all that matter?

It all starts at the longer 8-position receiver extension. This allows the use of a longer rifle-length action spring, which more evenly spreads the load over more coils and lets the system use more weight for the same amount of input, effectively widening the operating range of the entire system and making the rifle less sensitive to ammo choice, cleaning (or lack thereof), and environmental conditions.

A longer buffer is used to compensate for the longer receiver extension; this provides room for an extra buffer weight, bringing the total up to four weights instead of the standard three found in a carbine buffer. This gives more adjustability, with BCM's buffer weights ranging from 3.8oz (T0) to 7.4oz (T4). More weight not only slows the cycle of the gun and reduces recoil impulse, but it also delivers more chambering force and helps resist bolt bounce. The MK2 buffer also features an internal biasing spring, which ensures that the weights always sit towards the front face of the buffer, reducing noise and providing consistent carrier speed, aiding in more reliable chambering and extraction.

• 1x BCM MK2 Buffer T1 or T2
• 1x BCM MK2 Receiver Extension
• 1x BCM Rifle Length Action Spring
• 1x BCM QD Endplate
• 1x BCM Castle Nut
  

FEATURES

• Lessens felt recoil without compromising reliability
• Provides more consistent carrier velocity, which aids in reliability over conventional carbine buffer systems
• Increased internal counterweight travel reduces bolt bounce
• Internal spring to reduce the noise of the counterweight shifting and ensure more consistent weight placement
• Mil-Spec M16A4 rifle spring with more spring coils than M4 carbine increases consistency and widens the operating envelope of your rifle
• Buffer made of 7075-T6 aluminum, hard coat anodized for lasting endurance; comprised of Mil-Spec components
• Warranty: Covered by BCM's manufacturer warranty. Warranty service is provided by BCM.
• BCM US Patent #10415907

Made in the USA.

Technical Specifications