SIG CALXMCX5B300TAP CAL-X KIT, SIGMCX, 300 BLK,

Updated 04/22/26: We STIL ship ammo to CA now WITHOUT FFL required! Straight to your house. Ammo cases are shipping out quickly, But for smaller boxes order, expect a 6-10 day delay. If you place the order upon this text, it is valid and locked in, exempt from the rules change in the future.

SIG CALXMCX5B300TAP CAL-X KIT, SIGMCX, 300 BLK,

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Sig Sauer

SIG CALXMCX5B300TAP CAL-X KIT, SIGMCX, 300 BLK,

Item : 145223

SKU : CALX-MCX-5B-300-TAP

Model : Caliber Exchange

UPC : 798681587728

$699.00

$611.66

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Factory replacement 5.5" barrel for the MCX Rattler Genuine replacement barrel for the 5.5" 300 Blackout Rattler. Complete with barrel and gas block assembly..