Sig Sauer
MCX RATTLER - 5.56 5.5" CALIBER EXCHANGE KIT
Item # SIG WCALX-MCX-5B-556-TAP MSRP $999.99PRODUCT DETAILS
TECH SPECS:
This is a brand new Sig Sauer MCX Conversion kit to convert your MCX to 5.56mm NATO with an 5.5" barrel. Bolts are not included.
APP MCX Conversion kits have chrome-lined barrels which differentiate themselves from the commercial variants.
*Please Note
-This Barrel is compatible with the Rattler ONLY. This barrel is not compatible with the MCX Virtus or Legacy MCX Uppers.
-It will not function with a factory .300BLK handguard. This barrel requires the 5.56NATO Rattler handguard.
-The 5.56 flash hider is pinned and welded to the barrel, not threaded.
The SIG SAUER MCX Rattler 5.56 NATO 5.5" Barrel Caliber X-Change Kit (CALX-MCX-5B-556-TAP) is a genuine factory replacement barrel assembly engineered specifically for the 5.56 NATO Rattler platform. Designed for shooters who demand OEM reliability and precise fitment, this complete barrel assembly ensures your Rattler maintains the performance, durability, and accuracy expected from the MCX system.
Featuring a compact 5.5-inch barrel chambered in 5.56 NATO, this factory SIG component is built to original specifications for optimal gas system performance and consistent cycling within the Rattler platform. Whether you’re replacing a worn barrel or converting back to 5.56 NATO configuration, this Caliber X-Change kit delivers dependable results straight from SIG.
IMPORTANT FITMENT NOTICE:
This barrel is compatible with the MCX Rattler ONLY. It is NOT compatible with MCX Virtus or Legacy MCX upper receivers.
This barrel will NOT function with factory .300 BLK handguards and requires the 5.56 NATO Rattler handguard for proper installation and operation.
| MCX RATTLER - 300BLK 5.5" CALIBER EXCHANGE KIT (WCALX-MCX-5B-300-TAP) | |
|---|---|
| Caliber | 5.56 NATO |
| Barrel Length | 5.5 Inches |
| Platform Compatibility | MCX Rattler ONLY |
| Upper Compatibility | Not Compatible with MCX Virtus or Legacy MCX |
| Handguard Requirement | Requires 5.56 NATO Rattler Handguard |
| Compatibility Restriction | Will NOT function with factory .300 BLK handguards |
| Condition | New |
| Category | Rifle Barrels & Conversion Kits |
Questions 0
Ask a QuestionProven Arms & Outfitters A bolt-action rifle requires the shooter to manually operate a bolt to load a round, eject the spent casing, and chamber the next round. In contrast, a semi-automatic rifle is designed to automatically eject the spent casing and chamber a new round with each pull of the trigger. Semi-automatic rifles offer faster follow-up shots, while bolt-action rifles are typically more accurate due to their design.
SORT BY MOST RECENT
No Customer Review on this product
PRODUCT DETAILS
TECH SPECS:
This is a brand new Sig Sauer MCX Conversion kit to convert your MCX to 5.56mm NATO with an 5.5" barrel. Bolts are not included.
APP MCX Conversion kits have chrome-lined barrels which differentiate themselves from the commercial variants.
*Please Note
-This Barrel is compatible with the Rattler ONLY. This barrel is not compatible with the MCX Virtus or Legacy MCX Uppers.
-It will not function with a factory .300BLK handguard. This barrel requires the 5.56NATO Rattler handguard.
-The 5.56 flash hider is pinned and welded to the barrel, not threaded.
The SIG SAUER MCX Rattler 5.56 NATO 5.5" Barrel Caliber X-Change Kit (CALX-MCX-5B-556-TAP) is a genuine factory replacement barrel assembly engineered specifically for the 5.56 NATO Rattler platform. Designed for shooters who demand OEM reliability and precise fitment, this complete barrel assembly ensures your Rattler maintains the performance, durability, and accuracy expected from the MCX system.
Featuring a compact 5.5-inch barrel chambered in 5.56 NATO, this factory SIG component is built to original specifications for optimal gas system performance and consistent cycling within the Rattler platform. Whether you’re replacing a worn barrel or converting back to 5.56 NATO configuration, this Caliber X-Change kit delivers dependable results straight from SIG.
IMPORTANT FITMENT NOTICE:
This barrel is compatible with the MCX Rattler ONLY. It is NOT compatible with MCX Virtus or Legacy MCX upper receivers.
This barrel will NOT function with factory .300 BLK handguards and requires the 5.56 NATO Rattler handguard for proper installation and operation.
| MCX RATTLER - 300BLK 5.5" CALIBER EXCHANGE KIT (WCALX-MCX-5B-300-TAP) | |
|---|---|
| Caliber | 5.56 NATO |
| Barrel Length | 5.5 Inches |
| Platform Compatibility | MCX Rattler ONLY |
| Upper Compatibility | Not Compatible with MCX Virtus or Legacy MCX |
| Handguard Requirement | Requires 5.56 NATO Rattler Handguard |
| Compatibility Restriction | Will NOT function with factory .300 BLK handguards |
| Condition | New |
| Category | Rifle Barrels & Conversion Kits |
SORT BY MOST RECENT
No Customer Review on this product
Questions 0
Ask a QuestionProven Arms & Outfitters A bolt-action rifle requires the shooter to manually operate a bolt to load a round, eject the spent casing, and chamber the next round. In contrast, a semi-automatic rifle is designed to automatically eject the spent casing and chamber a new round with each pull of the trigger. Semi-automatic rifles offer faster follow-up shots, while bolt-action rifles are typically more accurate due to their design.
