Description
Item Description
Bryant Ridge Co. is pleased to present this semi-automatic pistol today for a penny-start auction, this is the Sig Sauer MCX Rattler LT.
SPECIFICATIONS:
Manufacturer: Sig Sauer
Model: MCX Rattler LT
Serial: 63J085690
Caliber: .300 Blackout
Finish: Black Anodized
Barrel Length: 6.75" Cold Hammer-Forged Barrel with 5/8x24 Tapered Threads, 1:5 Twist Rate, and SIG SLX/SLH Suppressor-Ready Flash Hider
Optics/Sights: None (Full-Length Picatinny Rail)
Stock/Grips: Side Folding Pistol Brace with Aggressive Textured Polymer Pistol Grip and Free-Floating M-LOK Aluminum Alloy Handguard
Action: Semi-Automatic
Markings: Standard
Bryant Ridge's Analysis:
All of the breakthrough features of the original MCX Rattler are now in a more modular, more capable package. The MCX Rattler LT is purpose-built to meet the demands of Special Operations forces and deliver exceptional performance in an ultra-compact, highly refined package. Built around a proven short-stroke piston operating system, it offers enhanced reliability and smooth operation across a wide range of conditions, especially in suppressed or unsuppressed use. Chambered in .300 Blackout, this configuration reflects the platform’s optimized design for short-barrel efficiency, further supported by its adjustable gas system. At its core is a cold hammer-forged 6.75-inch barrel with a fast 1:5 twist rate and precision 5/8x24 tapered threads, engineered to maximize ballistic performance in a compact footprint and ensure secure muzzle device alignment. Fully ambidextrous controls—including bolt catch and bolt release—provide intuitive, repeatable handling from either side, complemented by a SIG flat-blade match trigger that delivers a crisp, consistent break for improved precision and control. Outfitted with a SIG SLX/SLH suppressor-ready flash hider, it is suppressor-ready from the outset, reinforcing its role as a compact, mission-capable system.
Model: MCX Rattler LT
Serial: 63J085690
Caliber: .300 Blackout
Finish: Black Anodized
Barrel Length: 6.75" Cold Hammer-Forged Barrel with 5/8x24 Tapered Threads, 1:5 Twist Rate, and SIG SLX/SLH Suppressor-Ready Flash Hider
Optics/Sights: None (Full-Length Picatinny Rail)
Stock/Grips: Side Folding Pistol Brace with Aggressive Textured Polymer Pistol Grip and Free-Floating M-LOK Aluminum Alloy Handguard
Action: Semi-Automatic
Markings: Standard
Bryant Ridge's Analysis:
All of the breakthrough features of the original MCX Rattler are now in a more modular, more capable package. The MCX Rattler LT is purpose-built to meet the demands of Special Operations forces and deliver exceptional performance in an ultra-compact, highly refined package. Built around a proven short-stroke piston operating system, it offers enhanced reliability and smooth operation across a wide range of conditions, especially in suppressed or unsuppressed use. Chambered in .300 Blackout, this configuration reflects the platform’s optimized design for short-barrel efficiency, further supported by its adjustable gas system. At its core is a cold hammer-forged 6.75-inch barrel with a fast 1:5 twist rate and precision 5/8x24 tapered threads, engineered to maximize ballistic performance in a compact footprint and ensure secure muzzle device alignment. Fully ambidextrous controls—including bolt catch and bolt release—provide intuitive, repeatable handling from either side, complemented by a SIG flat-blade match trigger that delivers a crisp, consistent break for improved precision and control. Outfitted with a SIG SLX/SLH suppressor-ready flash hider, it is suppressor-ready from the outset, reinforcing its role as a compact, mission-capable system.
The platform’s full compatibility with all MCX LT barrels and handguards further enhances its modularity, and a free-floating aluminum alloy handguard with integrated M-LOK and Picatinny interfaces supports modern accessory integration. An AR-compatible PDW grip and AR-15 magazine compatibility add familiar ergonomics and versatility, and the durable black anodized receiver keeps weight and durability in balance within an overall length of 25.4 inches—resulting in a highly adaptable, exceptionally well-balanced firearm that blends advanced engineering with real-world practicality.
Contents:
This example will ship with one PMAG Gen M3 30-round magazine.
Return Policy:
We gladly offer a 3-day unfired inspection policy from the time that the firearm is delivered to your FFL. Refunds are available for all qualifying orders.
Shipping Details
Handgun Standard Shipping with Insurance $50.00
Long Gun Standard Shipping with Insurance $70.00
Any orders placed with magazines that are not compliant with your state, county, or city regulations will not ship with your order.
We strive to ship orders within the close of the following business day after payment and documentation is received.
Payment Details
We accept all forms of Payment including Personal Check, Business Check, PO Money Orders, Certified Check, Etc.
Please note we place a 7 business day hold on shipment, for all non-certified payments.
Payment MUST be received within 14 days.
Return Policy
We gladly offer a 3 day unfired inspection policy from the time that the firearm is delivered to your FFL. Refunds are available for all qualifying orders.
Additional Details
Our #1 priority is customer satisfaction. We want to build a lasting trust in the relationship with our customers, so that you will always look to us for all your firearms needs. If you have any issues with your transactions please contact us, and we will work with you to resolve any issues you may have. We greatly appreciate your trust in us and we look forward to fulfilling all your future firearm needs.
Bryant Ridge also reserves the right to cancel any sales that may occur while gunbroker.com is experiencing technical issues that affects the entire site or a complete site outage, within an hour of the auction ending.
We have an amazing inventory of classic and collector firearms that we are adding to Gunbroker daily. Stay up to date on all of our latest auction by adding us to your favorite sellers list.
About Us
From a small town hobby, to a leader in the investment and collector grade firearms industry. Bryant Ridge Firearms is here to offer the best in quality and customer service when you are looking to unload your collector grade firearm collection. 
Additional Information
GunbrokerLink: |
https://www.gunbroker.com/item/1165216216 |
BidPrice: |
0.01 |
AuctionEndDate: |
2026-04-19 22:00:00 |
CurrentBid: |
1950 |
SoldOutTime: |
2026-04-19 18:02:25 |
