Product Description
Spikes ST-T3 Heavy Buffer - 5.4 Ounce: Enhanced AR-15 Performance
Upgrade your AR-15 with the Spikes ST-T3 Heavy Buffer - 5.4 Ounce, designed to deliver smoother recoil, improved cycle timing, and greater reliability. CNC machined from solid billet aluminum and finished with a durable anodized matte black, this buffer is built to Mil-spec standards and backed by Spike’s Tactical. Compatible with multiple AR-15 calibers, it’s a maintenance-free solution that ensures consistent performance in every round you fire.
Key Features:
- Weight: 5.4 ounces for reduced recoil and enhanced cycle timing
- Construction: CNC machined from billet aluminum bar stock
- Finish: Anodized matte black with a laser-engraved Spike’s logo
- Mil-Spec Bumper: Durable and reliable
- Maintenance-Free: 100% hassle-free design
- Compatibility: Ideal for .223/5.56 but suitable for all AR-15 calibers
Boost your rifle’s reliability and precision with the Spikes ST-T3 Heavy Buffer - 5.4 Ounce—the perfect upgrade for serious shooters and enthusiasts alike.
Other Details
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Product Reviews
7 Reviews Hide Reviews Show Reviews
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Quieter Action and Less Muzzle Flip
I run a short-barreled AR pistol, sometimes suppressed, and the Spikes ST-T3 Heavy Buffer noticeably tamed the muzzle rise. My rounds eject cleanly, and the action is much quieter—no more jangling buffer weights. It’s a bit pricier than some options, but worth it for a smoother, more reliable shooting experience.
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Excellent Ejection Pattern
I struggled with random ejection on my 16” 5.56 AR, but swapping to the Spikes ST-T3 Heavy Buffer - 5.4 Ounce changed everything. Now, brass consistently lands around 3:30, and the rifle feels more balanced. Best of all, it’s truly maintenance-free. This is a must-have upgrade for anyone chasing perfect ejection.
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Slightly Lighter Than 5.4 Oz, Still Great
I picked up the Spikes ST-T3 Heavy Buffer - 5.4 Ounce hoping to eliminate some of the clunky noise in my AR. It’s definitely quieter, and the cycling feels smoother. My scale measured it a bit under 5.4 ounces, but performance-wise, no complaints. A solid purchase overall.
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Smoothed Out My 10.5? AR Pistol
This is my second time using a Spike’s heavy buffer, and the ST-T3 works wonders in my 10.5? pistol build. I noticed an immediate reduction in felt recoil and muzzle flip. Cobratac shipped quickly, and I’m really impressed with the overall quality. It’s easily the best buffer upgrade I’ve done.
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No More Rattle, Just Reliable Operation
I got tired of the rattling weights in my old buffer, so I switched to the Spikes ST-T3 Heavy Buffer - 5.4 Ounce. It uses tungsten powder, which means zero shake and a much quieter action. My mid-length AR cycles so much more smoothly now. Yes, it’s pricier than a standard buffer, but it’s absolutely worth every penny.
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Perfect Upgrade for My Sig M400
I installed the Spikes ST-T3 Heavy Buffer - 5.4 Ounce on my Sig M400 Enhanced with a flat wire spring, and the improvement was immediate. My brass now ejects consistently at 3:30, and the action feels smoother overall. Compared to my stock setup, this combo truly locks up the bolt, even if I ride the charging handle slowly. Highly recommend for anyone wanting a tighter, more reliable carbine.
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Best buffer for my 7.62x39 7.5" AR pistol
I have this buffer in my 7.62x39 7.5" AR pistol and cycles perfectly like I want!!! Great finish and exact weight!!!
