Spike's Tactical ST-T3 Tungsten Heavy Buffer - 5.4oz

Manufactured by Spike's Tactical
5 Reviews


In Stock

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The ST-T3 buffer provides a firmer recoil impulse and is intended for machine guns, suppressed weapons, and rifles that suffer from overgassing. Weighing in at 5.4 oz (154g), the ST-T3 is CNC machined from solid billet aluminum bar stock for strength and durability; not casted then machined like many other buffers on the market. It is then anodized matte black and laser engraved with the Spike’s Tactical logo. Each ST-T3 buffer contains three sliding solid weights cut from tungsten bar stock and topped off with a Mil-Spec bumper.

  • Designed for use with overgassed guns
  • CNC machined from aluminum
  • 3 internal Tungsten weights
  • Eliminates bolt bounce
  • For carbine length receiver extensions
  • Weight: 5.4 ounces

The ST-T3 eliminates the chance of bolt bounce, helps with muzzle rise when firing in full-auto, and cuts down on felt recoil. While designed for .223 Rem/5.56 NATO, it works for all calibers! Get one for your AR-15 today and feel the difference. This 3.25" buffer is compatible with AR-15 MIL-SPEC and Commercial spec receiver extensions or 8" GI-spec AR-10/AR-308 receiver extensions.


BrandSpike's Tactical
Manufacturer.Spike's Tactical
TypeBuffer - H3 Heavy Carbine
Weight5.4 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

5 reviews

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by -

the sliding weights move back and forth within the buffer. This causes and annoying rattle in an otherwise tight rifle. Functions as promised. But the rifle is noisy when carrying

Very nice

by -

Fixed my LRBHO function on my PSA Glock compatible lower.

Another Great Product

by -

Spikes has done it again. Another great product. I bought this to use in a DPMS LR308, that repeatedly malfunctioned, due to over gassing. I installed this buffer and no more malfunctioning. I then bought a second one for another .308 AR that had the same problem. Cured both of them. You will need a .308 length tube, to use this in a 308.

Works for my suppressed setup


Got this for my suppressed AR (16" mid-length barrel) that would not run correctly with the A2 stock (rifle buffer) system. Got a spikes spacer as well as a carbine spring and this T3 buffer and it runs like it was designed that way. Couldn't be happier.

Solved my cycling problems


Was having cycling problems with a friend's .300 BO 18" carbine. This buffer solved it. It's Spikes so you know it's good stuff.