Davidson Defense AR-15 Mil-Spec Buffer Tube Kit 7075-T6 Dry Film Coated, 5.5oz H3 Buffer, Flatwire Spring

AR-15 Mil-Spec Buffer Tube Kit

This Davidson Defense buffer tube kit gives you the core recoil management components your AR-15 needs. It's built around a 7075-T6 aluminum tube with dry film coating for smooth cycling and corrosion resistance. You get a 5.5oz H3 buffer, a flatwire recoil spring in corrosion-resistant stainless steel, plus the castle nut and end plate to secure everything to your lower receiver.

Key Features

• 7075-T6 aluminum buffer tube with Type III hardcoat anodize and dry film coating
• 5.5oz H3 buffer for standard carbine cycling
• Flatwire recoil spring in 17-4 PH stainless steel
• Castle nut and end plate included
• Mil-Spec compatible with standard AR-15 lower receivers

Perfect For

• Builders completing a full build kit or upper assembly
• Shooters replacing worn or damaged buffer systems
• AR-15 platforms requiring Mil-Spec recoil management
• Builds prioritizing corrosion resistance and durability

Buffer System Reliability

This kit delivers the recoil control your AR-15 needs for consistent cycling. The 7075-T6 aluminum is stronger than standard 6061 aluminum, and the dry film coating reduces friction while protecting against corrosion. The flatwire spring design improves reliability compared to traditional coil springs by reducing spring noise and providing more consistent spring rates across cycles.

H3 Buffer Tuning

The 5.5oz H3 buffer sits in the middle of the standard buffer weight range, making it the right choice for most carbine-length gas systems and mid-length configurations. It balances recoil impulse reduction with reliable bolt carrier cycling. If you're running a rifle-length gas system or a particularly aggressive load, you might consider a heavier buffer later, but this H3 is the proven baseline for Mil-Spec builds.

Corrosion Resistance Design

The combination of 17-4 PH stainless steel in the recoil spring and the hardcoat anodize on the tube means this kit handles moisture and salt environments better than standard mil-spec components. The dry film coating on the tube itself reduces friction while adding an extra layer of protection against corrosion.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.