Cmmg MK4: Semi Auto Firearm with Vortex Scope Precision

Every operator and serious shooter knows that a rifle is more than a list of parts — it’s a system built to deliver predictable performance, repeatable accuracy, and ergonomic control under stress. The CMMG MK4 delivers that balance with practical features aimed at shooters who demand reliability and value in a semi auto platform.

The CMMG MK4 ships configured with a mid-length gas system and a 1/7 twist rate, Magpul MOE pistol grip, CTR adjustable stock, Keymod handguard, and a muzzle brake. It arrives with a Vortex Strike Eagle 1-6×24 illuminated reticle scope already mounted, and one 30-round magazine included. This Certified Used example is offered at $1,234.99, making it an attractive option for shooters who want a fully featured, ready-to-run semi auto rifle without paying new-gun premiums. View product details and pricing

Overview: Built for practical accuracy and comfort

The CMMG MK4 is a highly practical semi auto built around a mid-length gas system — a configuration that smooths recoil impulse and extends component life compared with shorter gas systems. The 1/7 twist rate gives this platform flexibility to stabilize a wide range of bullet weights, which, in practice, supports consistent feeding and a broad ammunition tolerance for training, competition, or defensive applications.

Key features and what they mean for you

Mid-length gas system

A mid-length system positions the gas port further from the chamber than carbine-length setups. The result is gentler bolt carrier movement and reduced recoil impulse. For follow-up shots and prolonged strings of fire, shooters notice a less abrupt rearward motion. That makes acquiring follow-up shots easier and reduces wear on small parts.

1/7 twist barrel

The 1/7 twist rate is commonly used to stabilize a wide weight range of projectiles. While exact caliber specifics are not listed for this offering, that twist rate is capable of stabilizing heavier bullets typically used in precision-oriented loads. Confirm the chambering on the product page if you require a specific caliber for hunting or competition rounds.

Ergonomics: Magpul MOE grip and CTR stock

Comfort and control are essential. The Magpul MOE pistol grip offers a low-profile, secure hold that works well for shooters with a variety of hand sizes, while the CTR adjustable stock provides a solid cheek weld and minimal wobble on the buffer tube. Together they deliver a repeatable shooting platform for sight acquisition and sight alignment with the Vortex optic.

Keymod handguard and muzzle brake

The Keymod handguard keeps weight down and allows the mounting of accessories where you need them without adding bulk. The included muzzle brake helps manage recoil and muzzle rise, which helps keep the optic on target after each shot—particularly beneficial when paired with the 1-6x magnification range of the included optic.

Optics: Vortex Strike Eagle 1-6×24 illuminated reticle

Having a Vortex Strike Eagle 1-6×24 illuminated reticle scope in the package elevates the rifle from “bare optic ready” to a mission-capable rig out of the box. The 1-6x magnification range is ideal for close to intermediate engagements, providing a wide field of view at 1x and useful zoom for 200+ yard precision at 6x. The illuminated reticle helps in low-light or high-contrast backgrounds.

Accessories included and readiness

This CMMG MK4 includes one 30-round magazine, so you can get on the range immediately. The combination of optic, magazine, and adjustable stock makes this Certified Used rifle a practical grab-and-go option for training, duty-style drills, and home defense planning.

Shop this product and you’ll see the Certified Used stamp that confirms the rifle is in very good to excellent condition and held to a high quality standard with a ‘no questions asked’ return policy.

Performance considerations and recommended uses

Expect the CMMG MK4 to be at home in training circuits, carbine courses, and practical matches where fast transitions and reliable fire are tested. The mid-length gas system and muzzle brake reduce felt recoil and help maintain sight picture during strings of fire. The optic’s 1-6x range supports quick target acquisition at close distances and effective engagement at intermediate ranges. Before purchasing, verify the listed chambering on the product page if you require a particular caliber for match rules or local regulations.

Value and the Certified Used advantage

At $1,234.99, the CMMG MK4 presents a compelling value when bundled with a high-quality optic and accessory package. The Certified Used designation protects the buyer with clear condition standards and a straightforward return policy. For shooters prioritizing performance per dollar, a Certified Used CMMG MK4 is a practical way to access a feature-rich rifle without the depreciation hit of buying new.

For shooters who want a ready-to-run semi auto rifle with practical controls, a capable optic, and a proven gas system, the CMMG MK4 is a strong candidate. Check current availability on the product page where you can view full specifications and purchase options. Check availability

People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.