- Product Code: 55CA977
CMMG Buffer Assembly, Carbine, AR15 - AR15 spare part designed for carbine-length systems. This carbine-class buffer is intended for use with the AR15 Carbine Action Spring and M4/Carbine-length buffer tubes, and it is also compatible with the CMMG Fastback Receiver Extension solution. A complete Carbine AR15 Buffer Tube Kit is available separately from the manufacturer. The product meets or exceeds mil-spec requirements, ensuring compatibility with AR standards in terms of dimensions and functionality.
The buffer is standard carbine-weight (H0), balancing the movement of the bolt carrier group and ensuring smooth cycling operation. The body is made of lightweight and durable aluminum with a hard-anodized finish for improved wear resistance. Inside, steel weights and elastomer spacers dampen the end of the stroke, and the rear polyurethane bumper absorbs the final load of the movement. The buffer is delivered without a spring and tube, which are selected separately for the carbine-length system.
The dimensions conform to carbine standards: overall length is approximately 8.26 cm (3.25 in) and body diameter is approximately 2.36 cm (0.93 in). The weight is approximately 85 g (3.0 oz), which is typical for the CAR/H0 class. Compatibility includes AR15 lower receiver platforms with M4/Carbine-length buffer tubes; the buffer is not intended for rifle-length or A5-type buffer tubes. This makes it a clear choice when adhering to carbine standards and ensuring part compatibility.
CMMG Buffer Assembly, Carbine, AR15 - Features:
- Type: AR15 carbine buffer (CAR/H0)
- Weight: approximately 85 g (3.0 oz)
- Length: approximately 8.26 cm (3.25 in)
- Diameter: approximately 2.36 cm (0.93 in)
- Material, body: aluminum, hard-anodized finish
- Interior: steel weights and elastomer spacers
- End bumper: polyurethane
- Roll pin: steel
- Compatibility: AR15 Carbine Action Spring; M4/Carbine-length buffer tube; CMMG Fastback Receiver Extension
- Standard: meets or exceeds mil-spec
- Package: buffer only (does not include spring or buffer tube)
- Manufacturer: CMMG
Summary: CMMG's carbine-class buffer is mil-spec compatible and a standard-class solution for AR15 carbines. It offers balanced cycling operation, durable hard-anodized construction, and direct compatibility with M4/Carbine-length buffer tubes. It is a justified choice when seeking assured compatibility and a clear path for spare parts or upgrades.
Recommended use: suitable for AR15 carbine system maintenance, as a spare part, or for building, when the goal is a mil-spec compatible and standard carbine-weight buffer solution.
Product text updated 9.3.2026.
