Primary Weapons PWS Enhanced Steel Body Buffer H4, 6.8oz (5PWCB-SW-1F)

The Primary Weapons Systems Enhanced Steel Body Buffer H4 is a 6.8oz buffer tube component engineered for AR-pattern rifles running suppressors. If you're shooting suppressed and dealing with overgassing, velocity spikes, or rough cycling, a heavier buffer is one of the first tuning moves that pays dividends—and PWS's H4 is purpose-built for that role. The steel construction paired with PWS's proprietary FNC LIFE HD surface treatment creates a durable, self-lubricating component that runs cleaner and smoother than bare steel, even through extended range sessions.

What sets PWS's Enhanced buffers apart is the fluted design with strategically minimal contact points. Instead of a solid mass that traps carbon and debris, the fluted geometry lets fouling pass through the buffer tube rather than accumulate. Combined with the FNC LIFE HD chemical lubrication bonded to the steel surface, you get a buffer that cycles more reliably and requires less frequent cleaning—especially important if you're running a can and dealing with increased dwell time and backpressure.

The H4 is PWS's heaviest buffer offering, making it the right choice for suppressed shooting where you need that extra mass to regulate bolt carrier speed and reduce felt recoil. It's also the go-to weight if you're running a heavy bolt carrier group, low-velocity ammunition, or both. Pair it with the right spring weight and you'll dial in the kind of reliable, smooth operation that makes for better shooting and longer component life.

Key Features

• Steel body construction with FNC LIFE HD surface treatment for self-lubrication and corrosion resistance
• Fluted design with minimum contact points allows debris to clear rather than accumulate
• 6.8oz weight—PWS's heaviest buffer, optimized for suppressed fire
• Designed to regulate cycling on high-pressure suppressed builds

Specifications

Frequently Asked Questions

Is the H4 buffer right for my suppressed AR?

The H4 is PWS's heaviest buffer and is specifically intended for suppressed use. If you're running a can and experiencing overgassing, fast bolt cycling, or rough operation, the H4 is designed to add the mass needed to regulate dwell and smooth things out. Pair it with a tuned spring weight for your specific setup.

How does the fluted design help reliability?

The fluted geometry with minimum contact points allows carbon and debris to pass through the buffer tube rather than getting trapped and building up inside. This keeps the buffer running cleaner and more reliably, especially important when running suppressed where increased backpressure and dwell time mean more fouling.

What's the FNC LIFE HD treatment?

FNC LIFE HD is a chemical treatment that bonds lubrication directly to the steel surface, reducing friction and improving corrosion resistance. It means your buffer runs smoother and self-lubricates, requiring less frequent cleaning and maintenance.

What buffer weights does PWS offer?

PWS Enhanced buffers are available in three weights: H2 (4.4oz), H3 (5.1oz), and H4 (6.8oz). The H4 is the heaviest and is designed for suppressed applications.