Description

The SIG Sauer MCX-R Regulator is a purpose-built semi-automatic rifle engineered for shooters who demand precision, reliability, and modern modularity. Chambered in .223 Rem / 5.56 NATO, this rifle features a 16-inch barrel paired with a SIG 2-Port Muzzle Brake to reduce recoil and muzzle rise, delivering faster follow-up shots and consistent on-target performance. Finished in durable Flat Dark Earth Cerakote, the MCX-R Regulator is built to withstand heavy use while maintaining a refined, professional appearance.

Designed with versatility in mind, the MCX-R Regulator is equipped with a free-float M-LOK handguard that allows for easy mounting of optics, lights, and accessories without compromising accuracy. The Magpul SGA stock provides a stable, ergonomic shooting platform well suited for range work and training. Ambidextrous controls enhance usability for both right- and left-handed shooters, reinforcing SIG Sauer’s commitment to thoughtful design and real-world performance.

Key Features

  • Manufacturer: SIG Sauer
  • Model: MCX-R Regulator
  • Caliber: .223 Rem / 5.56 NATO
  • Condition: New
  • Action: Semi-automatic
  • Barrel Length: 16"
  • Capacity: 10 rounds
  • Number of Magazines Included: 1
  • Finish: Flat Dark Earth Cerakote
  • Muzzle Device: SIG 2-Port Muzzle Brake
  • Handguard: Free-float M-LOK
  • Stock: Magpul SGA
  • Safety: Ambidextrous
  • Weight: 8 lbs
  • Overall Length: 39.10"
  • What’s Included: One magazine
Explore more 223/5.56 Sig Sauer deals.

Rebates for Sig Sauer brand

Exp. date: 01.09.2026
Buy a New Applicable SIG SAUER Handgun Between 06/01/26 and 08/31/26, Receive One (1) SIG SAUER FOXTROT-EDC COMPACT Flashlight. (SKU: SOFEC002)
*Purchases of all SIG SAUER P365, P320, M17-M18, P210, P211, P220, P226, P229 and 1911 models are included in this offer. All other SIG SAUER Handguns are excluded from this promotion.

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Compare prices for 798681696413 - Sig Sauer MCX-R Regulator Coyote Brown 223/5.56 RMCXR-556N-16B from all vendors

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$2,749.99
19.95
$2,799.99
19.99
$2,837.28
OPTICS Ship FREE! - NO TAX Outside TX - NO CC Fees
$2,972.99
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$2,999.99
25.00
$3,190.99
$14.99 flat rate
Out Of Stock
$1,299.99
$19.95
$1,308.00
Calculated in Cart
$1,371.99
Firearms & Suppressors $19.99 | Accessories $14.95 - $19.99
$1,399.99
$13.95 flat rate S/H
$1,399.99
Shipping calculated in cart
$1,416.99
19.99
$1,464.99
$39.99
$1,500.00
19.99
$1,666.67
45.00
$2,798.05
Free Shipping
$2,799.99
$15
$2,799.99
Calculated at checkout
$2,874.51
19.99
$2,999.00
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$3,139.99
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