ARMASPEC Sound Mitigation Buffer H3 Gen 3 (SMB)

The ARMASPEC Sound Mitigation Buffer (SMB) Gen 3 is a single-stage captured drop-in replacement for a standard AR-15 buffer and spring. It is engineered to prevent the buffer spring from rubbing against the inner wall of the buffer tube, producing smoother and quieter cycling. The captured design maintains spring alignment and supports adjustable spring weight for tuning to your setup.

Key Specifications

• The model is Sound Mitigation Buffer Gen 3 (H3).
• The unit is supplied as an AR-15 accessory.
• The buffer functions as a single-stage captured drop-in replacement for standard buffers and springs.
• The product weight is listed as 5.6 oz.
• The published dimensions are 1.55 x 3.85 x 9.0.
• The published height is 1.5500 (units as provided).
• The published width is 3.8500 (units as provided).
• The published length is 9 (units as provided).
• The unit color is Black.
• Other features include a design to prevent buffer spring contact with the buffer tube inner wall for smoother, quieter operation and an adjustable spring weight.

The ARMASPEC SMB H3 Gen 3 is a practical upgrade for AR-15 owners seeking reduced spring noise and improved buffer alignment without complex installation. Its captured, drop-in design keeps the spring centered and helps deliver consistent cycling and reduced mechanical noise across a range of setups. For shooters prioritizing smooth, reliable operation from a simple, robust component, this buffer offers a straightforward path to quieter function and improved feel.