Armaspec Sound Mitigation Buffer 9, Gen 3 – 6.9 oz, 9mm Bolt Carriers

The Armaspec Sound Mitigation Buffer 9, Gen 3 (brand part number ARM258-9) is built to keep the buffer spring from rattling against the inner wall of the buffer tube on a 9mm AR-platform carbine, quieting the action for smoother, less distracting cycling. Armaspec engineers this Buffer 9 specifically for 9mm bolt carriers, setting the weight at 6.9 ounces to match the heavier reciprocating mass a straight-blowback 9mm action needs to cycle correctly. Because buffer weight is one of the simplest ways to fine-tune a 9mm AR’s cycling behavior, this Gen 3 model lets shooters dial in smoother, quieter operation without replacing the spring or tube. It is not compatible with standard 5.56/.223 bolt carrier groups.

Key Specifications

• Weighs 6.9 ounces, sized specifically for 9mm cycling mass.
• Built as the Gen 3 Sound Mitigation buffer design.
• Compatible with 9mm bolt carriers only.
• Keeps the buffer spring from rattling against the tube wall.
• Delivers smooth, quiet cycling.
• Lets shooters tune cycling behavior by adjusting buffer weight.

Frequently Asked Questions

Will this work with a 5.56 bolt carrier? No, this Buffer 9 is built specifically for 9mm bolt carriers only.

What does this buffer improve? It keeps the spring from rattling against the tube wall for smoother, quieter cycling.

Buy the Armaspec Sound Mitigation Buffer 9, Gen 3 – 6.9 oz, 9mm Bolt Carriers

Smooth out your 9mm carbine’s cycling with a purpose-built buffer weight. Order it from our Armaspec lineup, part of our AR buffer system selection, at our Lubbock, Texas gun shop for fast, direct shipping.