Description
The Sig Sauer MCX Rattler Upper comes in .300 AAC Blackout with a 5.5-inch barrel. It’s built for the SIG MCX platform and features an M-LOK compatible handguard for mounting accessories.
Sig Sauer MCX Rattler Upper Specifications
- Manufacturer: Sig Sauer
- Manufacturer Part Number: UAMCX-5B-300-BLK-TAP
- Model: MCX Rattler Upper
- Upper Type: Upper Receiver
- Caliber: .300 AAC Blackout
- Barrel Length: 5.5″
- Finish/Color: Black
- UPC: 798681587735
This upper is a solid choice for building a short-barreled rifle (SBR) or a pistol, keeping in mind California’s restrictions on features. The .300 Blackout cartridge is popular for both target shooting and hunting on private land where allowed. A shorter overall length makes it easier to handle, good for close-quarters situations or general range use.
This is an upper receiver only; it does not include a lower receiver. Assembly requires a qualified gunsmith and adherence to all state and federal laws.
California FFL Transfer: All firearms and firearm parts (including uppers) must ship to a licensed California dealer (FLD). We handle all FFL transfers in-house here at our San Diego location. We also ship to other California FLDs if you prefer. Please be aware of all California restrictions before ordering.
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