The Geissele Premium Mil-Spec Buffer Tube is precision-machined from 7075-T6 aluminum and finished with a durable Type 3 hardcoat anodize. Built to true mil-spec standards, this carbine-length, mil-spec diameter buffer tube features six stock positions and weighs just 3.7 oz. Made in the USA, it ensures reliable compatibility with most mil-spec AR-15 stocks and includes a high-quality mil-spec castle nut and end plate for a complete installation.
The included Geissele Super 42® Spring is engineered to enhance the reliability and performance of AR-15 pattern rifles. Its innovative three-strand braided design, inspired by the German MG42 machine gun, functions as a harmonic damper to absorb excess energy and reduce wear. Compared to standard buffer springs, the Super 42 offers improved longevity, minimizes the common “twang” sound, and delivers approximately 15% greater return force—helping ensure dependable feeding, even in dirty conditions or when using steel-case ammunition.
Key Features
- 7075-T6 aluminum mil-spec buffer tube
- Type 3 hardcoat anodized finish
- Carbine-length, 6-position, mil-spec diameter
- Weighs 3.7 oz; made in the USA
- Includes mil-spec castle nut and end plate
- Super 42® braided three-strand spring design
- Reduces wear and eliminates “twang”
- ~15% stronger return force for improved reliability
NOTE: The Super 42 is for use with Carbine length buffer tubes and is not compatible with rifle length or A5 buffer tubes/receiver extensions. We do not recommend the Super 42 with 300 Blackout subsonic ammunition. The Super 42 Spring may be too powerful and not allow the rifle to function properly.
