Sig Sauer MCX Rattler 5.56 NATO 5.5" M-LOK Upper Receiver UAMCX-5B-556-BLK-TAP
Lowest Listed Price
$1,999.99
MSRP
$1,999.99
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Updated
Aug 26, 2026
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Specifications
Description
Upper Receiver for the Sig Sauer MCX Rattler. Features a 5.5 inch barrel and a polymer handgaurd with MLOK attachment points, and a full length picatinny rail for the installation of sights, optics and other accessories. Additionally, the this upper comes with a receiver stock adapter kit, side folding AR buffer tube knuckler, and match duo trigger kit. Sig Sauer MCX Rattler 5.56 NATO 5.5" M-LOK Upper Receiver UAMCX-5B-556-BLK-TAP
