This is a brand new Sig Sauer MCX Conversion kit to convert your MCX Rattler from .300 Blackout to 5.56mm NATO with a 5.5" Barrel or can be used as a backup barrel assembly for your existing 5.56mm Rattler. This kit will ONLY work on an MCX Rattler. If you have an MCX that is not a Rattler model this will NOT WORK on your MCX.
All NFA rules apply.
|Caliber||.223 / 5.56|
|Accessory Rail||Not Applicable|
|Warranty||Warranty provided by product manufacturer.|
|Shipping Price||Sig Sauer firearms and Sig Sauer accessories over $100 ship free.|