Sig Sauer MCX-Rattler LT .300 BLK - Custom Works SIG Shorts, Miami Tiger Stripe Cerakote, ROMEO8T, 6.75 in Threaded Barrel
This Sig Sauer MCX-Rattler LT is a limited Custom Works release from the SIG Shorts series, distinguished by its Miami Tiger Stripe Cerakote and factory-equipped SIG SAUER ROMEO8T optic with a matching protective shroud. Built in 2024 and chambered in .300 AAC Blackout, it pairs a compact 6.75 in barrel with the bufferless MCX design and an adjustable gas system, and it includes a full Custom Works package with case, certificate, and accessories.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: The firearm is in solid functional shape. Scratches and blemishes are present. The bore is clean and shiny.
What’s Included
- SIG Custom Works metal hard case
- Strike Industries stabilizing brace (installed)
- SIG SAUER ROMEO8T red-dot sight (installed)
- Custom Miami Tiger Stripe ROMEO8T protective shroud (installed)
- Heat Wave Z87+ sunglasses with branded pouch
- SIG Custom Works Certified Custom certificate/card
- Magazines: 3x 30-round mags and 1x 20-round mag
- Magpul PMAG polymer magazines marked '300 BLK'
The Miami Tiger Stripe finish sets this MCX-Rattler LT apart, combining a Custom Works build with the SIG Shorts limited-run program of approximately 300 units. The factory package includes a ROMEO8T 1x red-dot enhanced with a Miami Tiger Stripe protective shroud, making this example both distinctive and turnkey.
The short-stroke gas piston system teams with an adjustable gas regulator marked with plus/minus settings to tune .300 BLK performance. A 6.75 in cold-hammer-forged carbon steel barrel uses a fast 1:5 twist, and the 5/8x24 threaded muzzle comes with a factory three-prong flash hider and suppressor-ready configuration.
The bufferless MCX architecture allows operation with the brace folded, made possible by the 1913 rear rail and Strike Industries hinge. Controls are ambidextrous throughout, including the safety selector and magazine release, and the flat trigger and ambidextrous butterfly charging handle support fast, consistent handling.
A free-float MCX-pattern aluminum handguard and aluminum receivers finished in Miami Tiger Stripe Cerakote complete the build. Notable factory markings include a magwell marked 'SIG MCX MULTI-CALIBER' and a 'CUSTOM WORKS' receiver plate, underscoring the limited-edition provenance.