SIG SAUER Forward Assist Spring Review

Let’s Talk About SIG SAUER Forward Assist Spring

The forward assist on an AR-platform rifle is a crucial component, ensuring the bolt is fully seated and locked into the chamber, especially in adverse conditions. The SIG SAUER Forward Assist Spring, though a seemingly insignificant part, plays a vital role in the proper functioning of this mechanism. Without a properly functioning spring, the forward assist becomes useless, potentially leading to malfunctions when you need your rifle the most.

My own experience with AR platform rifles has taught me the importance of even the smallest components. I recently acquired a used SIG SAUER MCX, and during a routine inspection, I noticed the forward assist felt mushy and didn’t return with the crispness I expected.

Upon disassembly, I discovered the spring was corroded and slightly deformed. I immediately started searching for a replacement, specifically looking for a SIG SAUER part to ensure compatibility and reliability.

I considered universal AR-15 spring kits from Brownells and MidwayUSA, and a similar spring from CMMG. I picked the SIG SAUER Forward Assist Spring because I wanted a genuine factory replacement to guarantee proper fit and function within my SIG SAUER MCX platform, eliminating any potential compatibility issues.

My initial impression was relief; it was exactly what I needed. The spring appeared robust and of high quality, exactly what I expect from SIG SAUER.

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Real-World Testing: Putting SIG SAUER Forward Assist Spring to the Test

First Use Experience

The initial test occurred during a range session focused on reliability drills with my SIG SAUER MCX. This was at an outdoor range known for its exposure to the elements, which allowed me to evaluate the SIG SAUER Forward Assist Spring under near-real-world conditions.

The weather was slightly damp with a light drizzle, conditions where a properly functioning forward assist is particularly important. Installation was straightforward, and immediately, the forward assist felt responsive and positive.

There were no malfunctions attributed to the bolt not fully seating. After 100 rounds, everything functioned perfectly.

Extended Use & Reliability

After several months and hundreds of rounds, the SIG SAUER Forward Assist Spring continues to perform flawlessly. The spring action remains crisp and reliable.

There are no signs of wear or corrosion despite exposure to varying weather conditions and rigorous cleaning. The original spring showed corrosion quite quickly, highlighting the superior quality of this SIG SAUER replacement.

Compared to my previous experience with aftermarket springs that often lost tension quickly, this SIG SAUER Forward Assist Spring has far exceeded my expectations, demonstrating its resilience and reliability.

Breaking Down the Features of SIG SAUER Forward Assist Spring

Specifications

The SIG SAUER Forward Assist Spring is a small but crucial component for any AR-15 or SIG SAUER MCX owner. The spring is made from high-quality steel to ensure longevity and resistance to corrosion. It is specifically designed to fit the SIG SAUER MCX platform, ensuring proper function and fitment.

The finish is unfinished, which is typical for internal springs and doesn’t impact performance. The crucial specification is its compatibility with the SIG SAUER MCX.

These specifications matter because the forward assist is vital in ensuring that the bolt is fully seated. Without a proper spring, the forward assist will not function correctly, potentially leading to failure to feed or failure to extract malfunctions.

Performance & Functionality

The SIG SAUER Forward Assist Spring performs its job perfectly. It provides the necessary tension to ensure the forward assist button returns properly.

The spring’s strength is its reliability. There are no weaknesses apparent, given its specific and simple function. It absolutely meets the expectation of being a reliable replacement spring.

Design & Ergonomics

The SIG SAUER Forward Assist Spring is designed with functionality and durability in mind. The steel material and proper tension ensures smooth operation.

This is an internal component and its design is not complex. There is no learning curve; it’s a simple drop-in replacement.

Durability & Maintenance

Given its steel construction, the SIG SAUER Forward Assist Spring should last a very long time. The key to longevity is to ensure it is kept clean and free of excessive lubrication.

The spring requires virtually no maintenance other than occasional inspection during routine firearm cleaning. A light wipe-down with a dry cloth is usually sufficient.

Accessories and Customization Options

There are no accessories that come specifically with the SIG SAUER Forward Assist Spring. Since it is a small, internal component, customization is not applicable.

This spring is specifically designed for the SIG SAUER MCX, so compatibility with accessories is not really a factor. There is no direct interaction with external accessories.

Pros and Cons of SIG SAUER Forward Assist Spring