Let’s Talk About Griffin Armament MK1 PSD 300BLK 9.5 inch Upper
The Griffin Armament MK1 PSD 300BLK 9.5 inch Upper is a purpose-built AR-15 upper receiver designed for those who value lightweight maneuverability and optimal performance with .300 Blackout ammunition. Griffin Armament aims to deliver a durable, accurate, and suppressor-ready platform in a compact package with this upper. Its features, like the M-LOK handguard and optimized barrel design, are designed to enhance the shooting experience.
For years, I’ve been building and modifying AR-platform rifles, always striving for the perfect balance between weight, accuracy, and reliability in various tactical scenarios. My focus shifted towards the .300 Blackout cartridge for its versatility in suppressed configurations, leading me to search for a high-quality, short-barreled upper. I needed a compact upper receiver that would be easy to maneuver in tight spaces and capable of delivering accurate fire at close to medium ranges, especially when suppressed.
The Griffin Armament MK1 PSD arrived well-packaged. The initial impression was positive. The lightweight construction was immediately noticeable, and the finish appeared to be high-quality.
I was considering the Daniel Defense MK18 upper and the Bravo Company Manufacturing (BCM) 9″ 300 Blackout upper when deciding on the Griffin Armament MK1 PSD. The Griffin Armament upper caught my eye due to its focus on lightweight design and suppressor compatibility. I felt this made it a better fit for my specific needs than the more general-purpose options from Daniel Defense and BCM.
My first impression was one of cautious optimism. The upper felt solid and well-made, but the real test would be how it performed on the range. I was both excited and a little apprehensive, hoping that it would live up to the hype.
Real-World Testing: Putting Griffin Armament MK1 PSD 300BLK 9.5 inch Upper to the Test
First Use Experience
The initial testing of the Griffin Armament MK1 PSD took place at my local outdoor shooting range. I mounted the upper on a reliable AR-15 lower receiver and used both supersonic and subsonic .300 Blackout ammunition. The weather was clear and dry.
The upper performed admirably in the favorable conditions. It cycled reliably with both types of ammunition. The balance of the rifle felt excellent due to the lightweight upper, making it easy to handle.
The initial experience was straightforward. The upper attached seamlessly to my lower receiver. No tools were needed to quickly zero my red dot optic.
There were no significant issues during the first outing. I noticed a slight point-of-impact shift between supersonic and subsonic rounds, which is normal for the .300 Blackout cartridge.
Extended Use & Reliability
After several months of use, the Griffin Armament MK1 PSD has proven to be a reliable and durable platform. I’ve used it in various environments, including dusty outdoor ranges and during a few rainy training sessions. It has consistently performed well.
There are minimal signs of wear and tear. The finish remains intact, and the M-LOK handguard is still securely mounted. The barrel shows no signs of unusual wear.
Maintenance is simple. A standard AR-15 cleaning kit is all that’s needed to keep the upper in good working order. Regular lubrication of the bolt carrier group is essential for smooth operation.
I have experience with other .300 Blackout uppers. The Griffin Armament MK1 PSD stands out due to its lightweight design and reliable performance, especially when suppressed. It outperforms some heavier uppers I’ve used in terms of maneuverability.
Breaking Down the Features of Griffin Armament MK1 PSD 300BLK 9.5 inch Upper
Specifications
The Griffin Armament MK1 PSD 300BLK 9.5 inch Upper is chambered in .300 AAC Blackout. This caliber offers versatility in both supersonic and subsonic configurations, making it ideal for various applications.
The barrel length is 9.5 inches. This short barrel provides excellent maneuverability in tight spaces.
The upper includes a Griffin Silencer Mount Muzzle Device. This allows for easy and secure attachment of Griffin Armament suppressors.
The upper receiver and handguard feature an Anodized Black finish. This provides a durable and corrosion-resistant coating.
The handguard utilizes the M-LOK attachment system. This enables the user to easily mount accessories such as lights, lasers, and grips.
These specifications are crucial for several reasons. The .300 Blackout caliber provides versatility, while the short barrel enhances maneuverability. The Griffin silencer mount facilitates suppressor use, and the M-LOK handguard allows for customization.
Performance & Functionality
The Griffin Armament MK1 PSD 300BLK 9.5 inch Upper performs exceptionally well in its intended role. It delivers accurate and reliable fire in a compact package. The suppressed performance is outstanding.
The strengths include its lightweight design, reliable cycling, and excellent accuracy. One weakness, which is inherent to short-barreled .300 Blackout uppers, is a slight reduction in velocity compared to longer barrels.
The upper meets and exceeds expectations. It provides a reliable and accurate .300 Blackout platform. The ability to easily attach a suppressor is a significant advantage.
Design & Ergonomics
The build quality is excellent. The materials used feel robust and durable. The weight is noticeably light, contributing to enhanced maneuverability.
The upper is user-friendly. The M-LOK handguard provides ample space for attaching accessories. The overall design is well thought out and functional.
Durability & Maintenance
The Griffin Armament MK1 PSD is built to last. The anodized finish provides excellent protection against wear and corrosion. With proper maintenance, it should provide years of reliable service.
Maintenance is relatively straightforward. Standard AR-15 cleaning procedures are sufficient. Regular lubrication of the bolt carrier group is essential.
Accessories and Customization Options
The upper comes with a Griffin Silencer Mount Muzzle Device. This allows for easy attachment of Griffin Armament suppressors. The M-LOK handguard allows for a wide range of accessory options.
The upper is compatible with most standard AR-15 accessories. These include optics, lights, lasers, grips, and slings. It’s designed to integrate seamlessly with a variety of aftermarket components.
Pros and Cons of Griffin Armament MK1 PSD 300BLK 9.5 inch Upper
Pros
- Extremely Lightweight Design: Enhances maneuverability and reduces overall rifle weight.
- Reliable Cycling: Functions consistently with both supersonic and subsonic ammunition.
- Excellent Accuracy: Delivers consistent accuracy at close to medium ranges.
- Griffin Silencer Mount: Simplifies suppressor attachment and ensures secure mounting.
- Durable Construction: Built to withstand harsh conditions and provide years of reliable service.
Cons
- Shorter Barrel = Reduced Velocity
- Price Tag is a little high compared to similarly spec’d uppers
Who Should Buy Griffin Armament MK1 PSD 300BLK 9.5 inch Upper?
The Griffin Armament MK1 PSD 300BLK 9.5 inch Upper is perfect for:
- Tactical shooters who need a compact and maneuverable platform.
- Hunters who use .300 Blackout for suppressed hunting applications.
- Home defense enthusiasts who prioritize a lightweight and easy-to-handle rifle.
- Anyone looking to build a high-quality .300 Blackout AR-15.
This upper may not be the best choice for:
- Shooters who prioritize long-range accuracy above all else.
- Individuals on a very tight budget.
- Those who do not intend to use a suppressor.
Must-have accessories include:
- A high-quality .300 Blackout suppressor (ideally from Griffin Armament).
- A reliable red dot sight or holographic optic.
- A durable weapon light.
- Quality magazines designed for .300 Blackout ammunition.
Conclusion on Griffin Armament MK1 PSD 300BLK 9.5 inch Upper
The Griffin Armament MK1 PSD 300BLK 9.5 inch Upper is a well-designed and high-performing upper receiver that excels in its intended role. Its lightweight construction, reliable cycling, and excellent accuracy make it a top contender in the .300 Blackout market. The integrated silencer mount is a significant advantage for those who plan to use a suppressor.
The price is relatively high compared to some other options. The value proposition is strong for those who appreciate high-quality components, reliable performance, and the benefits of a lightweight platform.
I would highly recommend the Griffin Armament MK1 PSD to anyone looking for a top-tier .300 Blackout upper receiver. It’s a worthy investment for those who prioritize performance, reliability, and suppressor compatibility.
Consider the Griffin Armament MK1 PSD 300BLK 9.5 inch Upper if you are looking to build a high-quality, compact, and suppressor-ready AR-15. You won’t be disappointed!