Sig MCX Mandatory Carriage Assembly Replacement Program.

So Sig is conducting a mandatory replacement of the carriage assembly in SIG MCX rifles.

SIG has found through extensive factory testing that in extremely rare instances, not reported in the field and extremely difficult to replicate, a condition may exist causing an unintended discharge.

Sig advises to stop using the MCX immediately, register your firearm on their website if you haven’t already done so, then initiate the process and view a video explaining how to change out your carriage assembly.

I tried calling Sig this afternoon and wasn’t able to get through to a representative after being on hold for 20 minutes.

SIG will send you a prepaid box to return your complete carriage assembly to the factory. A new assembly, designed with the firing pin locking mechanism, will be shipped out to you within 5-7 working days of the receipt of your parts at no cost to you.

Sig is also providing a $50 gift voucher for any inconvenience this may have caused.

Way to go Sig for immediately taking care of this issue.  Though it doesn’t seem like an all out recall Sig seems committed to fixing any issues before an MCX owner could even have one.

Sig also noted:

*Serial numbers 63C000044 – 63C003702 – Contact SIG Customer Service for instructions.

*If you have replaced your trigger group with an aftermarket trigger please contact SIG Customer Service for instructions.

*SIG SAUER Dealers should call designated Commercial Sales Support Representative.

*Any MCX rifle with a serial number ending in 25000 or higher is exempt from this program.

Current Carriage Assembly



SIG SAUER – MCX Mandatory Carriage Assembly Replacement Program


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