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

Manufactured by Spike's Tactical
Manufactured by Spike's Tactical
5 Reviews

In Stock

NOTE: Limit 3 per household. Quantities exceeding 3 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 1 business days or less. FFL orders take approximately 10 business days or less if you can provide us an actively receiving FFL location. Due to high demand, there is a limit of 5 FFL items in a 30 day period.



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.
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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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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.

Another Great Product

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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.

Very nice

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Fixed my LRBHO function on my PSA Glock compatible lower.


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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