- Product Code: 55CA9A2
CMMG Spring, Action, Carbine, AR15 - is an AR15 spare part, specifically a buffer spring designed for the AR-15 carbine-length receiver extension tube, functioning as an action spring to ensure bolt movement return; it is designed for easy replacement and meets or exceeds mil-spec requirements, providing reliable operation in various AR-15 configurations.
Precisely manufactured spring steel construction delivers a consistent spring constant and feed, improving cycle repeatability and reducing jerks. Installation is straightforward with a drop-in style, requiring no permanent modifications; this allows for quick maintenance and replacement in the AR-15 lower receiver and carbine buffer tube system.
The carbine-length design is compatible with both mil-spec and commercial-type carbine receiver extension tubes (internal length approximately 17.8 cm, 7.0 in). This ensures wide compatibility with the AR-15 platform and allows the spring to be used in various upper receiver and buffer combinations. The design dimensions are made for reliable and consistent cycling with standard components.
CMMG Spring, Action, Carbine, AR15 - Features:
- Type: AR-15 carbine action/buffer spring
- Application: carbine receiver extension tube (approximately 17.8 cm, 7.0 in internal length)
- Standard: meets or exceeds mil-spec
- Compatibility: mil-spec and commercial carbine buffer tube systems
- Installation: drop-in, requires no permanent modifications
- Construction: spring steel, designed to deliver a consistent spring constant
- Manufacturer: CMMG
Summary: this carbine-length AR-15 buffer spring offers mil-spec level compatibility, a stable spring constant, and easy drop-in installation. It is a reliable choice when replacing a worn spring or assembling an AR-15 carbine system with dependable components.
Usage Recommendation: recommended for AR-15 carbine systems as a replacement spring or for assembly when seeking a mil-spec compatible and reliable action/buffer spring solution.
Product text updated on 9.3.2026.
