• Compatible with both Mil-Spec & Commercial carbine buffer tubes
  • 0.34 oz. lighter than Mil-Spec castle nut
  • Machined staking notches
  • Made in the U.S.A.


  • Material: 6AL4V Titanium
  • Finish: Hard Anodize Teflon
  • Weight: 0.32 oz.


  • AR-15 and AR-10 with carbine buffer tube


The last thing you’re going to do when you’re building an ultra-light competition rifle is skimp on the parts that hold the whole thing together. When you need a high-quality enhanced castle nut made from advanced materials, your best bet is going to be a titanium castle nut. Spike’s Tactical offers their Enhanced Titanium Castle Nut for the AR-15 and AR-10 platforms.

Ultra-light Titanium

Spike’s Enhanced Titanium Castle Nut is machined from 6AL4V Titanium billet and finished with a Hard Anodized Teflon coating. It weighs in at just 0.32 oz. for a weight savings of 0.34 oz. over the average AR castle nut. The edges of Spike’s Enhanced Castle nut are machined smooth to assure a solid engagement between parts. This quality nut is the one you need to hold it all together when you build that low mass weapon system.

American Made Quality and a Warranty to Match

Every one of Spike’s Tactical’s products is carefully crafted by American workers on state of the art equipment in their Florida based facilities. Spike’s uses only the finest U.S. sourced materials from titanium and aluminum alloys to hardened stainless. Each product is created from the appropriate material and given a task appropriate finish for a long service life. You can count on Spike’s to deliver unmatched quality, no matter what product you choose from their lineup.

Spike’s and Wing Tactical

When you combine the quality craftsmanship and Warranty from Spike’s Tactical with the superior customer service of Wing Tactical, you can’t go wrong. Let us bring you the quality products you need at a value you can appreciate. Give yourself an edge!

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Reviews (4)

  • Titanium castle nut

    Posted by Tim Vaughn on 23rd Dec 2019

    First rate, blasted finish blended well with my ATACS AU camo gun for almost1/2 the price of V Seven's product. Fit the Magpul castle nut wrench PERFECTLY, no play.

  • Ultra-light

    Posted by Richard F on 5th Jun 2019

    Ultra-light castle nut that has an attractive look.

  • Spikes Tactical Titainium castle nut.

    Posted by Brian Berg on 19th Mar 2019

    This Castle Nut is looks great on my Spikes 300 Blackout build. As advertised, it's very light weight, but also extremely durable. I would buy again.

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