Barrels > Sig Sauer CAL-X Kit - MCX .300 Blackout - 5.5" w/ Bolt and Tapered Lug

Sig Sauer CAL-X Kit - MCX .300 Blackout - 5.5" w/ Bolt and Tapered Lug

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Regular Price: $599.00
Our Price: $549.00
SKU: SG-CALX-MCX-5B-300-T
UPC: 798681587728
Out of stock
as of 08/15/2022 5:36PM CST


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Available OnlineOut of stock
Fountain Valley, CAOut of stock
The Colony, TXOut of stock
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Use this factory SIG Cal-X kit to convert your MCX to an MCX Rattler in .300 Blackout. Includes a 5.5" Blackout barrel assembly with tapered lug bolt. Compatible with standard AR15 magazines.

A new tapered bolt lug design results in smoother cycling and extends the bolt life.


All NFA rules apply to barrels less than 16" in length.

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