Spike's Tactical ST-T1 Tungsten Buffer - 3 oz

Manufactured by Spike's Tactical
Manufactured by Spike's Tactical
6 Reviews

In Stock

Standard orders will ship out 1 business day if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

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Looking for a heavy buffer to replace your standard carbine buffer? Spike’s Tactical came up with something that offers the highest performance at a reasonable price. The ST-T1 buffer is one of the softest shooting, smoothest, and quietest buffers on the market; not to mention it looks awesome! It doesn't have any weights to move around or fluids to leak out like some other buffers, so it's 100% maintenance free! Weighing in at 3 oz (85g), the ST-T1 buffer is CNC machined from solid billet aluminum bar stock for strength and durability and anodized matte black then laser engraved with the Spike's Tactical logo. This is the same buffer used in the ST Shooting Team's weapons.

Each ST-T1 buffer is filled with high density tungsten powder and topped off with a MIL-SPEC bumper. Because of this, there aren’t any reciprocating weights inside to make a lot of noise and it also makes for a very smooth cycling rifle. The ST-T1 eliminates the chance of bolt bounce, helps with muzzle rise when firing in full-auto, and cuts down on felt recoil. It is a huge upgrade from a standard carbine buffer. While designed for .223 Rem/5.56 NATO, the ST-T1 works with all calibers. Get one for your AR-15 today and feel the difference!
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BrandSpike's Tactical
Manufacturer.Spike's Tactical
TypeBuffer - Carbine
Weight3 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

California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

6 reviews

  • 3 stars
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  • 2 stars
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  • 1 star
  • 0 reviews



Spikes products live up to their reputation. This, and the polished buffer spring added a noticeable difference!

Quality AR15 buffer upgrade


Spike's ST-T1 buffer is a quality product and noticed the tungsten powder filled buffer with its sliky & quiet attributes compared to standard stock buffer with the internal weight moving within. Currently waiting on JP Enterprises AR15 performance buffer spring to complete the upgrade and pending range field test and reason for 4-star rating at this time.

Great choice!


The Spikes buffer is yet another winner offered by Spikes Tactical. Super high quality, and very attractive as well. They just keep doing it right. This 3.0 oz. buffer is a perfect choice, teamed up with a mid length gas system, and adjustable gas block.


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The best buffer, period. Love it. Less noise and rattle is more pleasing than you think.

Much better than PSA stock buffer!

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So honestly I thought this was just gonna be a regular buffer but compared to what shipped with me PSA 300 blk pistol its like night and day. The one that came with the original rifle was a POS. This one is solid as a rock. Of course it isn't a necessity purchase but most of the things we buy aren't. Highly recommend the product.

More for Primary Arms than the product

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I haven't had a chance to try it out just yet but it looks and feels like a quality product and it fit as expected. I purchased it with a carbine buffer spring, a small parts kit and an ambi sling point end plate. I did have some issues with the shipping company losing my package but Primary Arms was right on top of it making sure that I was taken care off so I highly recomend both this producct and Primary Arms. I've already come back to do more business with them.