Bushmaster AR15 Essentials Lower Parts Kit Review

First Impressions of Bushmaster AR15 Essentials Lower Parts Kit

The Bushmaster AR15 Essentials Lower Parts Kit promises a straightforward path to completing an AR-15 lower receiver. Bushmaster, a recognizable name in the AR-15 world, aims to provide a budget-friendly solution with this kit. I was eager to see if it lived up to the reputation of its manufacturer or if it compromised quality for cost.

Building AR-15s is a hobby and a necessity for me; I often tinker with different configurations for specific purposes, from precision target shooting to building lightweight, maneuverable rifles for close-quarters training. I needed a reliable, affordable lower parts kit for a new build focused on home defense. Several kits were on the market, but I was drawn to the Bushmaster name because of its history and assumed quality.

Upon unboxing, the kit appeared well-organized. The components were individually bagged, which is a nice touch. The initial impression was of a standard, no-frills kit; nothing stood out as particularly impressive, but nothing immediately screamed low quality either.

Compared to similar kits from Aero Precision and CMMG, the Bushmaster kit seemed on par in terms of the finish on the metal parts. The Aero Precision kit has a reputation for exceptional quality control, and the CMMG is known for its reliability, but both usually cost more than the Bushmaster. I hoped the Bushmaster AR15 Essentials Lower Parts Kit would offer similar performance at a better price point.

My initial impression was cautiously optimistic. The price was appealing, but I reserved judgment until I could install and test the kit. I was hoping for a hassle-free build experience, but the slightly lower price point always raises concerns about potential fitment or quality issues.

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Real-World Testing: Putting Bushmaster AR15 Essentials Lower Parts Kit to the Test

First Use Experience

I installed the Bushmaster AR15 Essentials Lower Parts Kit on a standard mil-spec lower receiver. I assembled the lower receiver at my workbench, following standard AR-15 building procedures. During the assembly process, I immediately encountered issues.

The takedown/pivot pin springs felt noticeably oversized compared to other LPKs I’ve used. This made installing the front pivot pin a bit of a struggle, requiring more force than usual. Furthermore, one of the takedown/pivot pin detents was entirely missing from the kit – a significant oversight.

Extended Use & Reliability

Due to the initial issues, I couldn’t fully evaluate the extended use and reliability of all the components. The trigger and hammer seemed to function correctly after installation, but I wasn’t confident in the long-term reliability given the missing and oversized parts. I had to immediately order replacement detents and springs from another manufacturer.

I replaced the problematic parts and finally made it to the range. After several hundred rounds, the trigger performed adequately, although it wasn’t exceptional. The trigger pull was gritty and heavier than I prefer, especially compared to aftermarket triggers I typically use.

The finish on the hammer and trigger showed wear relatively quickly, indicating the use of less durable materials compared to higher-end kits. Cleaning was straightforward, but the gritty trigger feel persisted even after thorough cleaning and lubrication. I wouldn’t say this kit outperformed any of my previous builds.

Breaking Down the Features of Bushmaster AR15 Essentials Lower Parts Kit

Specifications

The Bushmaster AR15 Essentials Lower Parts Kit includes the following components:

• Pistol Grip
• Pistol Grip Screw
• Pistol Grip Lock Washer
• Trigger
• Hammer
• Disconnector
• Trigger Spring
• Hammer Spring
• Disconnector Spring
• Safety Selector
• Safety Selector Detent
• Safety Selector Spring
• Magazine Catch
• Magazine Catch Spring
• Magazine Release Button
• Front Pivot Pin
• Rear Takedown Pin
• Bolt Catch
• Bolt Catch Spring
• Bolt Catch Buffer
• Bolt Catch Roll Pin
• Buffer Retainer
• Buffer Retainer Spring
• Missing: Takedown/Pivot Pin Detent (x1)
• Oversized: Takedown/Pivot Pin Spring (x2)

These specifications are standard for a mil-spec AR-15 lower parts kit. They dictate the functionality and compatibility with most AR-15 lower receivers.

Performance & Functionality

The Bushmaster AR15 Essentials Lower Parts Kit provides the essential components for a functional AR-15 lower. The trigger, while functional, is a significant drawback. The gritty pull and heavier weight detract from accuracy and overall shooting experience.

The missing detent and oversized springs raise concerns about quality control and reliability. The kit partially meets expectations, providing the bare minimum for functionality, but falls short in terms of quality and smooth operation.

Design & Ergonomics

The design is standard mil-spec, offering no ergonomic enhancements. The pistol grip is basic and functional, but likely the first thing most users will replace.

There is a noticeable learning curve due to the need to force the oversized springs. Novice builders could struggle.

Durability & Maintenance

The durability appears to be questionable, based on the wear observed on the trigger and hammer after only a few range sessions. The finish wore quickly.

Maintenance is standard for AR-15 components. However, the gritty trigger feel may require more frequent cleaning and lubrication to maintain even basic functionality.

Accessories and Customization Options

The kit itself doesn’t come with any accessories beyond the essential parts. It is fully compatible with all standard AR-15 pistol grips, triggers, safety selectors, and other lower receiver components.

Upgrading the trigger is highly recommended to improve the overall shooting experience. Aftermarket pistol grips are also a common upgrade.

Pros and Cons of Bushmaster AR15 Essentials Lower Parts Kit

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Who Should Buy Bushmaster AR15 Essentials Lower Parts Kit?

The Bushmaster AR15 Essentials Lower Parts Kit is perfect for budget-conscious builders who are comfortable troubleshooting minor issues and potentially replacing some parts. It could be suitable for those building a basic, no-frills AR-15 for recreational shooting or as a backup firearm, so long as replacement detents and springs are readily available.

This product should be skipped by anyone prioritizing high-quality components, smooth operation, and guaranteed reliability right out of the box. Experienced builders who demand precision and durability will likely be disappointed.

Must-have accessories or modifications include: replacement takedown/pivot pin detents and springs, an upgraded trigger, and possibly an aftermarket pistol grip.

Conclusion on Bushmaster AR15 Essentials Lower Parts Kit

The Bushmaster AR15 Essentials Lower Parts Kit promises affordability, but falls short on quality control and overall performance. The missing detent and oversized springs were significant setbacks, requiring additional expense and effort to rectify.

The value proposition is questionable. The low price is attractive, but the potential need to replace parts diminishes the savings.

I cannot confidently recommend this kit. While it provides the essential components, the quality control issues and lackluster trigger detract from the overall experience. There are other kits on the market that offer better value and reliability for a slightly higher price. Ultimately, I would suggest spending a bit more for a kit from a manufacturer with a stronger reputation for quality control.