SIG Sauer is issuing a mandatory product recall on a range of MCX rifles. In factory testing, on rare occasions, the SIG team found that they could sometimes cause a rifle to fire a negligent discharge when not safely handled.
The recall announcement reports that this malfunction has never happened in real-world shooting, only at the factory. Additionally, SIG testers could only replicate the malfunction with rifles chambered for 300 AAC Blackout. Just the same SIG is asking all MCX owners to send in their rifles for preventative upgrades for all MCX rifles.
“Failure to follow the loading procedures and basic rules of safe firearms handling outlined in the user’s manual has the potential to cause serious bodily harm or death,” states the announcement. “Although this has only been witnessed in 300 BLK, SIG has decided to upgrade all MCX models since the MCX is a modular platform and we want to ensure the quality and reliability of all products we manufacture.”
The announcement goes on to instruct MCX owners to stop using their guns immediately. SIG would like owners to visit the warranty registration website for fast service. Customers may also want to watch this video on how to remove their rifles’ bolt carriage assemblies for factory replacement.
“SIG will send you a prepaid box to return your complete carriage assembly to the factory,” says SIG. “A new assembly, designed with the firing pin locking mechanism, will be shipped out to you within 5 to 7 working days of the receipt of your parts at no cost to you. This upgraded carriage assembly addresses this potential issue while enhancing the performance and longevity of your rifle.”
MCX owners will also receive a $50 gift voucher for their troubles. SIG’s customer service number is open to anyone with any questions about their MCX rifles, even if it’s just to find out if their carbine is affected by this recall. The customer service number is 603-610-3000. SIG is asking dealers to contact their sales reps for support.
This mandatory replacement affects MCX carbines in the 63C000044 through 63C003702 serial number range. Any rifle serial number 25000 or higher is unaffected. Also anyone with an aftermarket trigger group is also asked to contact SIG for further instruction.
The new bolt carrier group and op rod assembly, or carriage assembly, has a new “dog leg” op rod instead of the original dovetail design. It also has a retained firing pin retaining pin, redesigned non free-floating firing pin and firing pin lock. The changes are limited to the carriage assembly which is still a drop-in part.
Customers don’t need to ship their entire rifles or uppers, just the carriage assembly. “SIG Sauer is committed to addressing this issue in an expedited manner, and appreciates your support.”
The SIG Sauer MCX is the company’s flagship carbine. The design uses a gas piston system contained entire in the upper receiver. This allows MCX rifles to use folding stocks and run extremely well suppressed.
These advanced carbines feature modular barrel and handguard assemblies. This allows shooters to swap barrel lengths and cartridges quickly. For this reason, owners of MCX products are asked to send in their Gen 1 carriage assemblies in for replacement no matter what their guns are chambered for.