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AR-15 Extended Carbine Buffer

AR-15 Extended Carbine Buffer – Optimized Length for Special Receiver Extensions

The AR-15 Extended Carbine Buffer is designed for use in AR-15/M4 platforms with A5 length receiver extensions or other specialized buffer tube setups that require a longer buffer body. By increasing the overall buffer length while maintaining precise weight tuning, extended carbine buffers help prevent bolt carrier overtravel, improve cycling smoothness, and reduce wear on internal components. Available in various weight configurations (Standard, H1, H2, H3, and H4), extended carbine buffers give shooters the flexibility to fine-tune their rifle’s performance for suppressed builds, SBRs, and custom gas systems.

Specifications:

• Length: 4.05 in
• Material: 7075-T6 aluminum
• Finish: Type III hardcoat anodized, matte black
• Compatibility: A5 receiver extensions, extended carbine buffer tubes, certain precision rifle builds

AR-15 Extended Carbine Buffer vs Standard Carbine Buffer

Feature / Spec Standard Carbine Buffer Extended Carbine Buffer
Length ~3.25 in (82.6 mm) ~4.05 in (102.8 mm)
Typical Weights Standard (3.0 oz), H1 (3.8 oz), H2 (4.6 oz), H3 (5.4 oz) Standard (3.8 oz), H1 (4.6 oz), H2 (5.4 oz), H3 (6.5 oz)
Best For Standard AR-15/M4 carbine-length buffer tubes A5-length receiver extensions, precision rifle builds, special gas systems
Overtravel Prevention No (designed for standard buffer tube length) Yes (longer body prevents bolt carrier overtravel)
Recoil Control Good, adjustable by weight Excellent, adjustable by weight + longer cycling stroke
Bolt Carrier Control Standard to improved (based on weight) Improved to maximum (based on weight and length)
Material 7075-T6 aluminum + steel/tungsten weights 7075-T6 aluminum + steel/tungsten weights
Finish Type III hardcoat anodized Type III hardcoat anodized
Compatibility MIL-SPEC carbine-length buffer tubes A5 receiver extensions, extended carbine buffer tubes

 

AR-15 Extended Carbine Buffer – Standard (3.8 oz)

Description:

The AR-15 Extended Carbine Buffer (3.8 oz) is designed for use in A5-length receiver extensions or other specialized buffer tube setups. The longer body prevents bolt carrier overtravel, providing smoother cycling and improved component longevity. Perfect for shooters looking for standard-weight operation with extended buffer benefits.

• Length: 4.05 in
• Weight: 3.8 oz 
• Material: 7075-T6 aluminum + steel weights
• Finish: Type III hardcoat anodized
• Best For: Standard gas systems in A5 or extended buffer tubes

AR-15 Extended Carbine Buffer – H1 (4.6 oz)

Description:

The AR-15 Extended Carbine Buffer H1 (4.6 oz) offers increased mass for reduced felt recoil and bolt bounce while retaining the overtravel prevention benefits of the extended body. Great for suppressed rifles or lightly over-gassed systems.

• Length: 4.05 in
• Weight: 4.6 oz 
• Material: 7075-T6 aluminum, one tungsten + two steel weights
• Finish: Type III hardcoat anodized
• Best For: Suppressed builds, mid-length or carbine gas in A5 systems

AR-15 Extended Carbine Buffer – H2 (5.4 oz)

Description:

The AR-15 Extended Carbine Buffer H2 (5.4 oz) combines the overtravel control of an extended buffer with the heavier mass of two tungsten weights and one steel weight. Ideal for short-barreled rifles (SBRs), suppressed setups, and over-gassed configurations.

• Length: 4.05 in
• Weight: 5.4 oz
• Material: 7075-T6 aluminum, two tungsten + one steel weight
• Finish: Type III hardcoat anodized
• Best For: SBRs, suppressed rifles, moderate to high gas pressure systems

AR-15 Extended Carbine Buffer – H3 (6.5 oz)

Description:

The AR-15 Extended Carbine Buffer H3 (6.5 oz) is the heaviest option in the extended series, with three tungsten weights for maximum recoil mitigation and slowest bolt cycling. Built for extreme over-gassed or full-auto A5-length systems.

• Length: 4.05 in
• Weight: 6.5 oz 
• Material: 7075-T6 aluminum + three tungsten weights
• Finish: Type III hardcoat anodized
• Best For: Suppressed SBRs, extreme over-gassed builds, full-auto platforms

AR-15 Extended Carbine Buffer – H4 (7.4 oz)

Description:

The AR-15 Extended Carbine Buffer H4 (~7.4 oz) is the heaviest option in the extended series, with four tungsten weights for maximum recoil mitigation and slowest bolt cycling. Built for extreme over-gassed or full-auto A5-length systems.

• Length: 4.05 in
• Weight: 7.4 oz
• Material: 7075-T6 or 6061-T6 aluminum + tungsten weights
• Finish: Type III hardcoat anodized
• Best For: Suppressed SBRs, extreme over-gassed builds, full-auto platforms