New SIG Sauer MCX-Rattler LT

Daniel Y
by Daniel Y
NEW Sig Sauer MCX-Rattler LT

SIG Sauer’s latest generation of the MCX now has its own Rattler model. The MCX-Rattler LT combines the features of the LT family with the compact size of the Rattler. How does it differ from earlier Rattlers? Let’s find out.

SIG Sauer @ TFB:

The Rattler LT has the new handguard design seen on the MCX Spear LT. Obviously, though, it is a little shorter. It also incorporates the ambidextrous controls (including right-side bolt catch) seen on the other LT models.

Unlike older Rattler iterations, the Rattler LT has either a 6.75- or 7.75-inch barrel. The original model had a 5.5-inch barrel in .300 Blackout. There are also now three caliber options. Here is a quick breakdown of the current options:

  • 5.56 NATO with a 6.5-inch barrel
  • .300 Blackout with a 6.5-inch barrel
  • 7.62×39 with a 7.5-inch barrel

Both pistol and SBR models are available for each caliber option. It is also very possible that more colors, calibers, or barrel lengths could be added in the future. They are already showing up at dealers as of writing with a street price of around $2,700.

New SIG Sauer MCX-Rattler LT
New SIG Sauer MCX-Rattler LT

Check Pricecs on SIG Sauer MCX-rattler LT Pistols

From the manufacturer:

All of the breakthrough features of the original MCX-Rattler now in a more modular, more capable package. Designed to meet the needs of Special Operations forces, the MCX-Rattler LT features fully ambidextrous controls, including an ambidextrous bolt-catch, bolt-release an adjustable gas piston for suppressed and unsuppressed use, and is fitted with the SIG QD suppressor-ready flash-hider and a flat-blade trigger for ultimate control. The MCX-Rattler LT also has either a cold hammer forged 6 or 7 3/4 barrel and is now fully compatible with all MCX barrels and handguards making it the ultimate modular package. Available in 300 blackout, 5.56 NATO as well as 7.62X39 calibers.

All images from SIG Sauer

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Daniel Y
Daniel Y

AKA @fromtheguncounter on Instagram. Gun nerd, reloader, attorney, and mediocre hunter. Daniel can still be found on occasion behind the counter at a local gun store. When he is not shooting, he enjoys hiking, camping, and rappelling around Utah.

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5 of 40 comments
  • FarmerB FarmerB on Dec 05, 2023

    Does anybody have the first clue what all these SIG trade names mean?
    Spears and MCX LTs and Rattler Spears and Spear LTs and Rattler Spear LT Turbos. I won’t buy these things when there is no clear product roadmap.

    • See 2 previous
    • FarmerB FarmerB on Dec 12, 2023

      @TheGreatDeception So, you're saying that I'm too stupid to understand their bizarre product naming conventions - always a winning strategy to think your customer is the stupid one.
      I have an original MPX and MCX, and so I'm at a dead end for any upgrades and development. But after that, their product strategy is all over the place.
      If they want to have bizarre names for something, then at least help me try and understand what category each thing is in.

      It seems to be a North American thing, it's very much less so in Europe. They want to trademark everything, so that every feature upgrade has a trademarked name.
      I like options, but you give the customer a bewildering array of options, then they don't choose anything. It would help if they could have a key to help us untangle it.

  • Spock Spock on Dec 06, 2023

    The description says “…..for suppressed and unsuppressed use…” So the 5.56 can be suppressed now. What’s the differences between the older Rattler and this LT?