Finding the Perfect Buffer Spring for Your PCC Build: A Comprehensive Guide

Finding the Perfect Buffer Spring for Your PCC Build: A Comprehensive Guide

Buffer spring selection plays a critical role in the overall performance of your pistol caliber carbine (PCC) build. In this comprehensive guide, we will explore the best practices for choosing the ideal buffer spring for your specific build, focusing on the top contenders in the industry - Sprinco and JP springs. By understanding the factors influencing buffer spring selection and the unique characteristics of each brand, you'll be better equipped to optimize your PCC build for both performance and reliability.

Table of Contents

General Buffer Spring Selection Tips

When selecting a buffer spring for your PCC build, it's important to choose the strongest buffer spring that cycles reliably and consistently. If your build has a bolt catch, you should ensure that the spring allows for reliable function of the bolt catch on an empty magazine. In some cases, the bolt may not lock back on the last round due to an overly strong buffer spring. Stepping down in spring power typically resolves this issue. Keep in mind that there is often some trial and error involved in buffer spring selection, as every gun cycles somewhat uniquely even with the same build specs. By testing different springs, you can find the optimal combination for your gun and the ammunition you use.

9mm PCC Buffer Spring Recommendations

For 9mm PCC builds, we recommend using an AR10/.308 carbine buffer spring for barrels that are 8" or longer. For shorter barrels, more trial and error is typically required, but a .223 carbine spring is generally appropriate. Extra power .223 springs are often ideal for all but the softest running systems.

AR15 and AR10 Buffer Spring Recommendations

When it comes to AR15 or AR10 rifle buffer tubes, always use the AR15 rifle buffer and AR15 rifle buffer spring or AR10 rifle buffer and AR10 rifle buffer spring. For AR10 carbines with either the AR15 or AR10/A5 buffer tube, always use an AR10/.308 carbine buffer spring. In the case of AR15 carbines, the buffer spring selection is broader and will depend on the specifics of the build. Understanding the unique requirements of your AR15 or AR10 build will help you make an informed decision when selecting a buffer spring.

Sprinco Springs Overview

Sprinco is a reputable brand known for producing high-quality buffer springs with a long service life. Sprinco Springs are made using certified Chrome Silicon Wire, which undergoes cryogenic heat treatment, shot peening, and moly plating. These processes ensure the springs are highly durable and can last for tens of thousands of rounds. However, Sprinco Springs may produce the typical AR spring twang, which could be a minor annoyance for some shooters.

JP Springs Overview

JP Springs are another popular option among PCC enthusiasts. Made from standard music wire, JP Springs may not have the same extended service life as Sprinco Springs but still offer a respectable performance (rated between 5,000 and 10,000 rounds depending on the gun). The key advantage of JP Springs is their ground-flat outer edges, which result in a smoother, quieter operation in the buffer tube. This feature is particularly beneficial for those using suppressed firearms, as it eliminates the annoying spring noise.

The Importance of Trial and Error

As mentioned earlier, finding the perfect buffer spring for your PCC build often involves some trial and error. While certain combinations might work well for one shooter, they may not necessarily provide the same results for another. Factors such as ammunition type, barrel length, and other build specifications can influence the ideal buffer spring choice. By testing different springs and observing their performance in your build, you'll be able to determine which option provides the most reliable, consistent cycling for your specific needs.


Selecting the right buffer spring for your PCC build is crucial for optimizing performance, reliability, and longevity. Both Sprinco and JP springs offer unique advantages that can cater to different shooter preferences and build requirements. By understanding the key characteristics of each brand and applying a trial-and-error approach, you can find the optimal buffer spring for your build.

Whichever spring option you decide to go with, be sure to check out the hydraulic buffers, buffer springs, buffer tubes, and more available from Blitzkrieg Components and AR rifle hydraulic buffers. These buffers are designed to further enhance your shooting performance, complementing your choice of springs and ensuring a top-notch PCC shooting experience.

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