CMMG 55CA977 Carbine Buffer Assembly for AR-15

The CMMG 55CA977 Buffer Assembly is a replacement buffer designed for AR-15 and M4 platforms that use a carbine receiver extension. It serves as the standard carbine-spec buffer used in carbine-length receiver systems and in CMMG 6 Position M4 Stock Kits. This part restores or maintains proper cycling and function in carbine-configured AR-platform rifles. It is intended as a direct, specification-matching replacement when a carbine buffer is required.

Key Specifications

• The manufacturer is CMMG.
• The model number is 55CA977.
• The product type is a buffer assembly.
• Designed for use in AR-15/M4 carbine receiver extensions.
• Compatible with CMMG 6 Position M4 Stock Kits.
• The firearm type fits the AR platform.
• The subcategory is Stocks & Buffer Tubes.
• Fit is specified for AR rifles.

Simple, functional, and built to fit carbine-length AR platforms, the CMMG 55CA977 buffer assembly offers a no-nonsense replacement option for maintaining reliable cycling and stock compatibility. Its straightforward design makes installation and maintenance uncomplicated, ideal for owners restoring factory configuration or keeping a carbine-platform rifle operating as intended.