Sig MCX Accessories

**SIG MCX-SPEAR LT 11.5" UPPER AR CONVERSION KIT – 5.56 NATO, BLACK** $1,736.50

**TriggerTech SIG MCX Adaptable Trigger – Curved** $279.99

**TriggerTech SIG MCX Adaptable Trigger – Flat** $279.99

**SIG MCX LT 9″ Caliber Exchange Kit – 5.56 NATO** $776.93

**Sig Sauer MCX-SPEAR LT 5.56 16" Tactical Rifle (Barrel Only)** $776.93

**SIG MCX-SPEAR LT 11.5-INCH 5.56 NATO BARREL AND GAS BLOCK ASSEMBLY (CALX KIT)** $776.93

**Sig MCX SPEAR LT 9″ Caliber Exchange Kit – 300BLK** $776.93

**Sig Mcx/mpx Flding/tlscping Stk Blk** $221.81

**MCX/MPX Stock Folding & Telescoping** $213.19

**Stock, Mcx, Mpx, Folding, Mil Spec Stock** $173.05

**Sig Sauer MCX Upper Receiver Assembly, Gen2, Semi Auto – Gray** $455.71

**Sig Sauer MCX Semi Auto Selector Kit** $33.29

**SIG MCX Take Down Pins & Springs** $33.29

**SIG MCX Piston Assembly – 6.75″ Barrel | 300 Blackout** $132.35

**SIG MCX Piston Assembly – 9″ Barrel | 300 Blackout (300 BLK)** $132.35

**SIG MCX Piston Assembly – 5.5″ Barrel | 300 Blackout** $132.35

**SIG SAUER Factory MCX Virtus Piston Assembly – 16″ Barrel | 300 Blackout** $132.35

**Sig MCX Virtus Piston Assembly – 16″ Barrel | 5.56 NATO** $132.35

Sig MCX Accessories – Build, Upgrade & Customize Your Rifle

🛠️ Premium Accessories for Sig MCX Virtus, Rattler & SPEAR LT

Outfit your Sig MCX with mission-ready accessories engineered for performance, compatibility, and reliability. Whether you’re upgrading a factory build or customizing a professional-grade setup, our selection of Sig MCX accessories covers every component — from triggers to caliber kits.

🔧 What Are Sig MCX Accessories?

Sig MCX accessories are OEM or aftermarket parts that enhance the functionality, handling, and performance of your MCX rifle. These parts are essential for:

🧱 Custom builds (Virtus, Rattler, SPEAR LT)
🔁 Caliber conversion (5.56, 300 BLK, 7.62x39)
🏆 Improved ergonomics (stocks, handguards)
⚙️ Enhanced controls (selectors, charging handles)

All parts listed here are vetted for fit and performance on Gen2 and Gen3 MCX rifles.

🧠 Shop By Accessory Type

Accessory Type	Top Brands	Compatible Models
Triggers	TriggerTech, Sig OEM	MCX Virtus, Rattler
Charging Handles	Sig Sauer	All MCX
Handguards	Sig OEM, Custom	M-LOK, suppressor-ready
Stocks	PCB, Mil-Spec Folding	Rattler, Virtus
Barrels	5.56, 300BLK, 7.62x39	Caliber exchange kits
Uppers	Sig OEM	Semi-auto MCX

🔥 Featured Sig MCX Accessories

Product	Description	Price
MCX Caliber Conversion Kit – 300 BLK	Includes barrel, gas block, bolt	$776.05
TriggerTech MCX Flat Trigger	Drop-in, precision curved/flat	$279.99
Sig MCX Folding PCB Stock	Low-profile, quick-deploy	$173.05
MCX Ambi Charging Handle	Smooth, ambidextrous upgrade	$93.08
MCX Selector Kit	Drop-in replacement	$33.35

💡 Why Upgrade Your MCX?

🔄 Convert calibers in seconds with Sig exchange kits
🎯 Get smoother breaks with a drop-in match trigger
🔦 Add tactical accessories with M-LOK handguards
💪 Enhance reliability with factory OEM gas systems
🧩 Adapt your rifle for suppressed or duty use

📋 Compatibility Notes

Model	Accessories Supported	Notes
MCX Virtus	Full range	Carbine/patrol-ready
MCX Rattler	Compact-specific	Shorter handguards, folding stocks
SPEAR LT	Upper + 8" handguard + kits	Gen3 components

Always confirm compatibility with your generation (Gen2 vs Gen3).

❓ Frequently Asked Questions (FAQ)

Q: Are MCX Rattler and Virtus parts interchangeable?
Some are, but not all. Handguards, barrels, and stocks often differ in length or interface.

Q: Can I convert my MCX to another caliber?
Yes. Use caliber exchange kits to convert between 5.56 NATO, 300 BLK, and other supported rounds.

Q: What’s the first accessory most MCX owners upgrade?
Triggers, charging handles, and handguards are the most popular upgrades due to improved control and feel.

⭐ Why Buy Sig MCX Accessories from Mounts Plus?

✅ Authorized dealer of Sig OEM parts & top-tier upgrades
✅ U.S.-based shipping with fast processing
✅ Trusted by law enforcement, military & civilian shooters
✅ Expert support with MCX knowledge

🚀 Build Your Perfect MCX Platform

Whether you're setting up a suppressed CQB rifle or a long-range DMR, Mounts Plus has the Sig MCX accessories you need to make your rifle mission-ready.