Armaspec SMB Buffer Kit, H3 Weight

The Armaspec SMB Buffer Kit, H3 Weight, Gen 3 (brand part no. ARM268-H3) is a complete drop-in buffer upgrade built around Armaspec’s Sound Mitigation Buffer (SMB) system. Armaspec designed the SMB to replace the OEM mil-spec buffer spring and weight as a matched pair, and the H3-weight version is the heaviest of Armaspec’s SMB lineup, built for the most aggressively over-gassed AR-15 builds. That added mass slows bolt-carrier velocity as much as possible within the SMB line, which helps control bolt bounce and felt recoil on carbines running short, suppressed, or otherwise heavily ported gas systems. This kit includes everything needed to complete the buffer system, so there is no need to source a separately matched spring.

Key Specifications

• Built around Armaspec’s Sound Mitigation Buffer (SMB) design for quieter, smoother cycling than an OEM buffer.
• Uses H3-weight mass, the heaviest option in Armaspec’s SMB lineup for the most aggressively over-gassed builds.
• Sold as a complete buffer tube assembly kit, including the matched spring needed alongside the SMB weight.

Frequently Asked Questions

Who should choose the H3 weight buffer? Shooters running the most aggressively over-gassed AR-15 builds, since H3 is the heaviest weight in Armaspec’s SMB lineup.

Does this kit include the spring? Yes, it is a complete buffer tube assembly with the SMB weight and its matched spring.

Buy the Armaspec SMB Buffer Kit, H3 Weight

Bring an aggressively over-gassed AR-15 under control with the heaviest buffer in Armaspec’s SMB line. Browse Schaefer Defense’s AR buffer system parts and order from our Lubbock, Texas gun shop — we’ll get it out to you as soon as it’s ready to ship.