Sig Sauer Mcx, Sig Pmcx556n7bltpcb Mcx 556 7.75 30r Blk

Sig Sauer MCX 5.56 NATO 7.75" Barrel 30-Round Black Rifle

Sig Sauer
SKU:
125476453
|
UPC:
798681699766
|
MPN:
PMCX556N7BLTPCB
$2,499.99
$2,729.99
(You save $230.00 )
Current Stock:
Product Specifications
Finish-Color:
Black
Capacity-Rounds:
30
Barrel Length:
7.75"
Caliber-Gauge:
223 Remington / 5.56 NATO
Barrel Length Range:
7" to 7.99"
OAL:
27.19"
Weight:
6.10 lbs
Weight Range:
6 lbs to 6.99 lbs
Product Overview

The Sig Sauer MCX 5.56 NATO rifle with a 7.75" barrel brings compact, modular firepower to shooters who need serious capability without sacrificing control or ergonomics. Built on the proven MCX platform, this 30-round rifle combines a cold hammer-forged barrel with fully ambidextrous controls—bolt catch, bolt release, and safety—making it equally at home in either hand. The adjustable gas piston system runs cleanly whether you're shooting suppressed or unsuppressed, and the SIG QD suppressor-ready flash hider is already threaded and installed, so you can add a can whenever you're ready.

What sets this rifle apart is its modularity. The barrel and handguard are fully compatible with all MCX barrels and handguards, so you can reconfigure your setup to match your mission without replacing the entire lower. The flat-blade trigger delivers the precision and control you'd expect from a Sig, giving you clean, predictable breaks whether you're running drills at 25 yards or stretching shots at distance. The 7.75" barrel strikes a practical balance between velocity and maneuverability—short enough to handle tight spaces and vehicle work, long enough to unlock the potential of the 5.56 round.

This is a rifle built for shooters who understand their tools. It handles suppressors, it adapts to different roles, and every control is where you need it regardless of your firing hand. Whether you're training, competing, or working, the MCX 5.56 delivers versatility without compromise.

Key Features

  • Cold hammer-forged 7.75" barrel for compact handling and reliable accuracy
  • Fully ambidextrous controls: bolt catch, bolt release, and safety
  • Adjustable gas piston system optimized for both suppressed and unsuppressed fire
  • SIG QD suppressor-ready flash hider (installed)
  • SIG flat-blade trigger for crisp, controlled breaks
  • Modular barrel and handguard compatibility with all MCX components
  • 30-round magazine capacity
  • Chambered in 5.56 NATO

Specifications

Caliber5.56 NATO
Barrel Length7.75 inches
Barrel TypeCold hammer-forged
Magazine Capacity30 rounds
FinishBlack
Gas SystemAdjustable gas piston
TriggerSIG flat-blade
Flash HiderSIG QD suppressor-ready
ControlsFully ambidextrous

Frequently Asked Questions

Is this rifle compatible with MCX handguards and barrels?

Yes. The MCX 5.56 is fully compatible with all MCX barrels and handguards, making it a genuinely modular platform. You can swap components to reconfigure the rifle for different roles and preferences.

Can I run this rifle suppressed?

Yes. The adjustable gas piston is tuned for both suppressed and unsuppressed operation, and the rifle comes equipped with a SIG QD suppressor-ready flash hider so you can attach a suppressor directly.

What controls are ambidextrous?

The bolt catch, bolt release, and safety are all fully ambidextrous, making the rifle equally functional for left- and right-handed shooters without modification.

What's included with this rifle?

The rifle ships with the SIG QD suppressor-ready flash hider already installed and a 30-round magazine. Specific additional accessories included with your purchase should be confirmed at the time of order.

Additional Information

Firearm Shipments:

To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.

We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.

We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.

Email: [email protected]

  • Prior to placing an order, it is the buyer's responsibility to understand and adhere to their state's firearm regulations.
  • The buyer should verify with their receiving dealer that the chosen firearm is legally permissible in their state.
  • The buyer is accountable for any transfer fees or background check charges imposed by the receiving dealer. If the designated dealer declines to accept the firearm delivery, the buyer assumes responsibility for shipping costs to retrieve the firearm and resend it to an accommodating dealer.
  • Handguns will be shipped using air transportation, while long guns can be shipped using ground methods. If your order includes a mix of firearm and non-firearm items, BOSQUE Outdoors will send the firearm(s) to your selected FFL dealer and the remaining non-firearm items to your billing address.
  • Firearms cannot be returned to BOSQUE Outdoors; please contact the manufacturer for warranty claims.
  • Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check are subject to a $75 restocking fee plus 10% of the purchase price.