Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver Review

Let’s Talk About Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver

The Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver stands out in a crowded AR-15 market. Manufactured by Primary Weapons Systems (PWS), this upper receiver boasts a long-stroke piston system, a .223 Wylde chamber, and a 14.5-inch barrel. It’s an upper receiver built for those seeking enhanced reliability and accuracy.

I was looking for an upper receiver that offered superior performance in adverse conditions. I wanted something more than just another direct impingement AR; reliability was paramount. I’d heard whispers of the PWS piston system and its ability to run cleaner and cooler, and I wanted to see it firsthand.

My first impression upon unboxing the MK114 MOD 2-M was solid. The fit and finish were impeccable, and the weight felt balanced. It gave me the impression of quality craftsmanship, immediately setting it apart from some of the more budget-friendly uppers I’ve handled.

Compared to a standard direct impingement upper from Bravo Company and a similar piston-driven upper from Adams Arms, the PWS felt more refined. The Adams Arms felt a bit clunky, and the BCM, while reliable, just didn’t offer the same advanced features. The PWS seemed like the perfect blend of innovation and practical design.

My initial reaction was excitement mixed with anticipation. I was eager to see how the MK114 would perform at the range and if it lived up to the hype surrounding its piston system. I anticipated superior reliability and accuracy, hoping it would prove a worthy upgrade to my existing AR platform.

Check Best Price HERE

Real-World Testing: Putting Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver to the Test

First Use Experience

I tested the Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver at my local shooting range. I focused on drills that would test the upper’s speed and accuracy. The weather was moderately humid, around 75 degrees Fahrenheit.

The MK114 performed exceptionally well, even with a variety of ammunition types. I experienced no failures to feed or eject across several hundred rounds. The recoil impulse felt smoother than my direct impingement AR, likely due to the piston system.

The upper was easy to install and immediately felt natural on my existing lower receiver. I quickly adjusted to the gas system’s settings. After the first range session, I noticed that the bolt carrier group was significantly cleaner compared to my DI ARs.

I was surprised by how easily the gas system could be adjusted. It was also a pleasant surprise to experience enhanced accuracy, especially at longer distances.

Extended Use & Reliability

After several months of consistent use, the Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver continues to impress. I’ve put it through various drills and competitions, and its reliability has remained unwavering. I have now fired thousands of rounds through the upper.

The finish shows minimal signs of wear, primarily around the ejection port. The piston system still cycles flawlessly. Cleaning and maintenance are noticeably easier than with a direct impingement system, reducing the time spent scrubbing carbon buildup.

Compared to my previous experiences with other AR uppers, the MK114 MOD 2-M stands out due to its consistent performance and ease of maintenance. It has definitely exceeded my expectations in terms of reliability and overall shooting experience.

Breaking Down the Features of Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver

Specifications

The Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver features a .223 Wylde chamber, which allows it to safely and accurately fire both .223 Remington and 5.56 NATO ammunition. It has a 14.5-inch barrel that is often considered an ideal length for maneuverability and ballistic performance. The 3-setting adjustable gas system allows the user to fine-tune the rifle’s operation based on ammunition type and environmental conditions.

The .223 Wylde chamber offers a versatile and accurate platform for various types of ammunition, making it ideal for both range use and more demanding applications. The 14.5-inch barrel provides a good balance between compactness and effective range, and is often a favorite among law enforcement and tactical users. The adjustability of the gas system ensures reliable operation in various scenarios, enhancing the overall user experience.

Performance & Functionality

The Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver performs exceptionally well, delivering consistent accuracy and reliability. The piston system ensures cleaner operation and reduced recoil. The adjustable gas system allows for fine-tuning, further enhancing its performance.

Its strengths include superior reliability, reduced carbon fouling, and enhanced accuracy. A potential weakness could be the higher initial cost compared to standard direct impingement uppers. Overall, it exceeds expectations, providing a noticeable improvement in performance and longevity.

Design & Ergonomics

The MK114 MOD 2-M is built with high-quality materials and features a robust design. The weight is well-balanced, making it comfortable to handle. The ergonomics are generally excellent, with intuitive controls.

The PWS design prioritizes functionality and durability, resulting in a user-friendly system. While there is a slight learning curve associated with understanding and adjusting the gas system, it’s easily manageable.

Durability & Maintenance

The Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver is built to last. With proper care, it should provide years of reliable service. It is easy to maintain and repair, primarily due to the reduced carbon fouling associated with the piston system.

The robust construction and simplified maintenance requirements contribute to its long-term value. Regular cleaning and lubrication of the moving parts are typically sufficient to keep the upper in optimal condition.

Accessories and Customization Options

The Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver is compatible with a wide range of AR-15 accessories. This includes various optics, lights, and foregrips. Due to the AR-15 platform’s widespread adoption, there are countless customization possibilities.

The upper receiver readily accepts standard AR-15 components, providing ample options for personalization. Consider a high-quality optic and a reliable weapon light to maximize its effectiveness.

Pros and Cons of Primary Weapons Systems MK114 MOD 2-M 14.5in bbl, .223 Wylde Upper Receiver