Armaspec Sound Mitigation Buffer Gen 3 - H3 (ARM258-H3 / ARMASPEC258H3)
Smooth out a standard AR-15 with the Armaspec Sound Mitigation Buffer Gen 3 - H3. This single-stage captured drop-in replaces the standard carbine buffer and spring, keeping the spring from rubbing the inner wall of the buffer tube for smoother, quieter operation and reduced felt recoil. It is built for AR-15 platforms and ships as a complete captured system in the H3 weight class.
The complete system has an actual weight of 6.71 oz and an equivalent weight of 5.6 oz, matching a traditional H3 buffer. The main spring is adjustable — it can be trimmed by 0.25 lb per coil (up to 12 coils maximum) so you can fine-tune tension for your ammunition, gas system, or suppressor use. Made in the USA and backed by a lifetime warranty. The kit includes a polymer base guide rod, spring, and buffer.
Key Features
- Single-stage captured drop-in replacement for a standard AR-15 buffer and spring
- H3 weight class for AR-15 carbine buffer systems
- Keeps the buffer spring from rubbing the buffer tube wall for quieter, smoother operation
- Helps reduce felt recoil
- Adjustable spring weight (trim 0.25 lb per coil, up to 12 coils max)
- Actual complete-system weight 6.71 oz / equivalent weight 5.6 oz
- Includes polymer base guide rod, spring, and buffer
- Made in the USA with a lifetime warranty
Specifications
- Manufacturer: Armaspec
- Model: Sound Mitigation Buffer Gen 3 - H3 (SMB)
- Manufacturer Part Number: ARM258-H3
- SKU: ARMASPEC258H3
- System Type: Single-stage captured buffer and spring assembly
- Weight Class: H3
- Compatibility: AR-15 carbine buffer systems
- Actual Weight (Complete System): 6.71 oz
- Equivalent Weight: 5.6 oz
- Origin: USA
- UPC: 810048492466
Installation is straightforward: insert the polymer base with guide rod into the buffer tube, place the spring on the guide rod, then slide the buffer over the spring. Confirm your AR-15 uses a standard carbine buffer tube before installation. The H3 weight is a common choice for heavily suppressed builds or rifles that need additional mass to manage increased back pressure.
Add this Armaspec Sound Mitigation Buffer Gen 3 H3 to your cart today and run a smoother, quieter AR-15!
