MCX ambidextrous charging handle bundled with a nitrided 4140PH steel spring plate that replaces SIG's molded plastic part on early MCX rifles.

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NLA Sig MCX Ambi Charge Handle and Block kit
SIG's first three MCX generations use a molded plastic spring plate that Next Level Armament says turns brittle and can break over time. This kit pairs Next Level's MCX ambidextrous charging handle with a replacement spring plate machined from solid 4140PH steel and Nextride coated.
The plate fits only the earlier MCX rifles without the pinned block. SIG redesigned the part for the Virtus and Rattler, so owners of those rifles should buy the handle alone, which Next Level lists for every MCX model.
Add the Next Level Armament SIG MCX Ambi Charging Handle and Spring Plate Kit to your build and see how it enhances your platform.