The CMC Trigger system has gained popularity among AR15 users for its ease of installation and high-performance characteristics. Designed as a true drop-in unit, the CMC trigger offers a self-contained solution that minimizes the complexity of installation. This article explores the features, installation process, and user experiences associated with the CMC trigger, focusing on the technical specifications and practical applications relevant to U.S. consumers and DIY enthusiasts.
Overview of CMC Trigger Systems
CMC Triggers is an American company based in Texas, known for its high-quality drop-in trigger systems for the AR platform. Their products are crafted from 8620 Alloy and S7 Tool steel, precision-machined to tolerances of ±.001". These triggers offer a crisp, glass-smooth break with minimal lock-time and a positive reset. The design includes a self-contained fire control group, allowing for a straightforward installation process that even novice users can manage.
The CMC trigger system is available in both single and two-stage configurations, with multiple pull weight options. Users can choose between curved and flat trigger bows, catering to different preferences and ergonomic needs. The system is also noted for its 100% U.S.-made design and manufacturing, ensuring a level of craftsmanship that meets the expectations of many American firearm enthusiasts.
Installation Process
The installation of the CMC trigger system is described as a simple and efficient process. The system is designed as a drop-in unit, eliminating the need to handle individual components such as the hammer, disconnector, and springs separately. This feature significantly reduces the time and complexity involved in installation compared to traditional mil-spec triggers, which require more manual assembly and adjustment.
Step-by-Step Installation
Preparation of the Lower Receiver
Begin by removing the existing grip and selector components from the lower receiver. This includes the spring, detent, and selector. These components are typically held in place by a screw, which should be removed carefully to avoid losing any small parts.Inserting the CMC Trigger Unit
Once the lower receiver is prepared, the CMC trigger unit is inserted into the trigger pocket. The unit is designed to fit seamlessly, with all internal components already assembled. This eliminates the need for manual alignment of the trigger, disconnector, and hammer, which are common challenges with standard triggers.Securing the Trigger Unit
After inserting the CMC unit into the lower receiver, the retention pins are used to secure the system. The CMC trigger includes its own retention pin kit, consisting of two floating pins and four set screws. The pins are inserted into the appropriate holes in the trigger, and the set screws are tightened to hold the pins in place. The system also includes Torx wrenches for the installation process, ensuring that users have all the necessary tools at hand.Testing and Adjustment
Once the CMC trigger is installed, it is important to perform functional checks to ensure that everything is working correctly. Dry-fire drills are recommended to test the trigger's performance, including the pull weight and reset. The CMC trigger is known for its crisp break and positive reset, which should be clearly noticeable during these tests.
The installation process is further simplified by the fact that the CMC trigger system comes pre-lubricated on the bearing surfaces. This eliminates the need for additional lubrication, which is often a step in the installation of traditional triggers. The overall process is reported to take less than five minutes, with the majority of the time spent on minor adjustments such as reinserting the grip screw.
Technical Specifications and Features
The CMC trigger system is available in various models to suit different user preferences and requirements. The models include both single and two-stage triggers, with pull weights ranging from 3.5 pounds to 6.5 pounds. Users can choose between flat and curved trigger bows, depending on their ergonomic needs. The following are key features of the CMC trigger system:
- Precision Machining: The trigger components are precision-machined to tolerances of ±.001", ensuring a high level of accuracy and consistency.
- Material Quality: The system is constructed from high-quality 8620 Alloy and S7 Tool steel, which contributes to its durability and performance.
- Crisp Break and Positive Reset: The CMC trigger is known for its crisp, glass-smooth break and a positive reset, making it suitable for hunting and competitive shooting.
- Drop-In Design: The self-contained nature of the CMC trigger allows for a straightforward installation process, making it accessible to users with varying levels of experience.
- Retention Pin System: The system includes its own retention pin kit, which simplifies the installation process and ensures a secure fit.
- U.S.-Made Manufacturing: The CMC trigger is 100% designed and manufactured in the USA, ensuring a high standard of quality and craftsmanship.
User Experiences and Performance
Users who have installed the CMC trigger system report a positive experience, particularly regarding the ease of installation and the performance of the trigger. The drop-in design allows for a quick and hassle-free installation, eliminating the need for extensive modifications to the lower receiver. The self-contained nature of the system means that users do not have to deal with individual components, which is a significant advantage over traditional triggers.
In terms of performance, the CMC trigger is praised for its crisp break and positive reset. The pull weight options provide flexibility for users to choose a configuration that suits their specific needs. For example, the 2/2 two-stage model offers a 2-pound first stage and a 2-pound second stage, which is ideal for hunting applications where a light and crisp trigger is preferred.
The unique hammer design used by CMC contributes to the overall performance of the trigger. The claw-like shape of the hammer and the bearing surfaces on the left and right sides help to ensure a smooth and consistent trigger pull. This design is also noted for its ability to reduce lock-time, which is the time between pulling the trigger and the bullet exiting the barrel. A shorter lock-time is generally preferred in competitive shooting and hunting scenarios.
Comparison with Traditional Triggers
The CMC trigger system is often compared to traditional mil-spec triggers, which require more manual assembly and adjustment. The drop-in design of the CMC system offers a significant advantage in terms of ease of installation and reliability. Traditional triggers often require users to handle individual components such as the hammer, disconnector, and springs, which can be time-consuming and challenging for novice users.
The CMC system eliminates the need for these adjustments, allowing for a more straightforward installation process. This is particularly beneficial for users who are new to AR15 customization or those who prefer a more streamlined approach to their builds. The self-contained nature of the CMC system also reduces the risk of errors during installation, which can be a common issue with traditional triggers.
Maintenance and Longevity
The CMC trigger system is designed for long-term use and minimal maintenance. The precision machining and high-quality materials contribute to its durability, ensuring that the trigger remains functional over an extended period. The system is also noted for its ability to maintain consistent performance even with regular use, making it suitable for both casual and competitive shooting applications.
Regular maintenance is recommended to ensure optimal performance, including cleaning and lubrication of the trigger components. The CMC system is pre-lubricated on the bearing surfaces, which reduces the need for frequent reapplication. However, users should still inspect the trigger for any signs of wear or damage, particularly if they are using the rifle in harsh environments.
Conclusion
The CMC Trigger system offers a high-performance solution for AR15 users seeking an easy-to-install and reliable trigger. The self-contained design, precision machining, and high-quality materials contribute to its durability and consistent performance. The drop-in installation process makes it accessible to users with varying levels of experience, reducing the time and complexity involved in the installation. With a range of pull weight options and ergonomic choices, the CMC system is well-suited for both hunting and competitive shooting applications.