THE A5
BUFFER SYSTEM
Developed at the request of the United States Marine Corps, the A5 is an intermediate-length buffer system that delivers the smooth, reliable cycling of a rifle-length action in a collapsible-stock package.
The heart of the "M16A5" concept — USMC testing confirmed increased parts longevity over both the M4 carbine and M16A2 systems across thousands of rounds.
HOW THE A5 WORKS
Three components working as a system to fundamentally improve how the AR-15 cycles. Click any component to learn more.
CHOOSE YOUR BUFFER
Five weight options to match your gas system, barrel length, and suppressor setup. Start with the A5H2 if you're unsure.
A5H2
A5 Buffer — 5.3 oz
$48
The standard A5 weight and the recommended starting point for most builds. Ships with the complete A5 kit. Works with 14.5"–16" barrels in both carbine and mid-length gas.
Best For
Weight
5.3 oz
Internal Weights
4 Tungsten
Material
Aluminum
Design
Deadblow
COMPLETE YOUR A5 SYSTEM
The A5 buffer requires a longer receiver extension and rifle-length spring to function. A standard carbine tube is too short — the buffer will over-travel and damage your lower receiver. Don't mix and match.
TECHNICAL RESOURCES
Deep-dive into the engineering behind the A5 system.
RE-A5 RECEIVER EXTENSION
The RE-A5 is the backbone of the system — a 7-position mil-spec receiver extension machined from impact-extruded 7075-T6 aluminum with a hard anodized finish. It accepts any standard mil-spec collapsible stock.
COMPATIBILITY WARNING
The RE-A5 is not compatible with standard carbine buffers or carbine springs. Using a carbine buffer in the A5 tube will cause the shorter buffer to over-travel, which can result in firearm damage. Always use A5-specific buffers and a rifle-length spring.
COMPLETE A5 KIT INCLUDES
- RE-A5 Receiver Extension (7-position)
- A5H2 Buffer (5.3 oz — standard weight)
- Rifle-length action spring
- VLTOR endplate & castle nut
UPGRADE YOUR PLATFORM
Ready to experience the difference? Browse our A5 components or reach out to our dealer program for volume pricing.