Sig Sauer MCX Semi Auto Selector Kit Bulk Order

Sig Sauer MCX Semi Auto Selector Kit – OEM Fire Control Parts for MCX Rifles

Precision Control. Factory Reliability. Built for the MCX Platform.

Upgrade or maintain your MCX rifle with the Sig Sauer MCX Semi Auto Selector Kit—a factory-original fire control component set engineered for semi-automatic MCX rifles chambered in .223 Rem, 5.56 NATO, or .300 Blackout. Designed to SIG Sauer’s exacting standards, this kit includes everything you need to restore, replace, or upgrade your fire selector mechanism with precision.

Whether you’re performing a full fire control group tune-up or building from scratch, this OEM selector kit ensures you retain the smooth, reliable selector action that MCX rifles are known for.

🔧 Key Features:

• ✅ Factory OEM SIG Sauer Parts – Made to spec for flawless integration with all SIG MCX semi-auto rifles.

• ⚙️ Complete Selector Assembly – Includes selector lever, cap, detents, springs, and cap pins.

• 🔩 Durable Steel Construction – Heat-treated steel with black finish for corrosion resistance and longevity.

• 🔁 Compatible Calibers – Designed for MCX platforms in .223 Rem, 5.56x45mm NATO, and .300 AAC Blackout.

• 🎯 Field-Tested Precision – Smooth, tactile selector engagement for consistent control.

What’s Included:

• Fire Control Selector

• Fire Control Selector Cap

• (2) Selector Detent Springs

• (2) Selector Detents

• (2) Selector Cap Pins

Note: Selector Kit does not include trigger group or safety lever.

Compatibility & Application:

Feature	Specification
Fits	Sig Sauer MCX (All Gen Semi-Auto Models)
Calibers	.223 Rem, 5.56 NATO, .300 Blackout
Material	Steel
Finish	Black / Unfinished Components
Firearm Type	Rifle (Semi-Auto Only)
Installation	Gunsmith Recommended

Why This Kit Matters:

Whether you’re customizing your MCX fire control or replacing worn components, precision selector engagement is critical. A gritty, loose, or unreliable safety selector can compromise both safety and function. With the Sig Sauer MCX Semi Auto Selector Kit, you’re choosing battle-tested reliability and factory-backed engineering trusted by professionals around the world.

WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.