3.5" AR .223/5.56 Short Buffer Tube System | Sunflower Yellow

3.5" AR-15 Short Buffer Tube System

The 3.5" short buffer tube system is engineered for compact AR-15 builds, making it ideal for .223 / 5.56 pistol builds, SBR configurations, and minimalist setups where space and weight matter. Designed to OEM dimensions and tolerances, this system supports reliable cycling when paired with the correct short buffer and spring.

Compact & Durable Design

Precision machined from high-grade aluminum, this short buffer tube offers durability, corrosion resistance, and consistent performance in demanding conditions. Its compact length makes it a go-to choice for builders looking to reduce overall rifle footprint without sacrificing function.

Cerakote Color Options

Available in a range of Cerakote finishes, this system allows you to customize your build while adding an extra layer of protection against wear and corrosion. Perfect for builders who want both performance and a standout finish.

What’s Included

• 3.5" short buffer tube (pistol-length)
• Castle nut (hardened steel)
• Receiver end plate (standard or QD option)
• Buffer retainer & spring
• Recommended short buffer (based on selection)

Built for Compact AR Setups

This short buffer tube system is ideal for:

• AR-15 pistol builds (.223 / 5.56)
• Short-barreled rifle (SBR) configurations
• Minimalist or PDW-style builds

Complete Your Build

Pair this system with compatible AR-15 buffer tubes or browse lower parts to complete your build with properly matched components.