What is 4150 CMV? Mil-Spec Barrel Steel Explained

Posted by Gunbuilders.com on Jul 25th 2025

Gun barrels are all made from two types of steel: Stainless, and carbon (we cover the differences here). Most tactical rifle owners prefer carbon steel barrels for their hardness, heat resistance, and longevity. There are a few types of carbon steels used to make barrels, but one type of steel -- ad …

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

416R Stainless vs. 4150 Carbon: Which Barrel Steel is Better

Posted by Gunbuilders.com on Jul 24th 2025

Whether you're building your first AR-15 from scratch, upgrading to a new upper receiver, or swapping barrels on your rifle, you've gotta pick between two types of steel: Carbon, or stainless. While there are different grades of each type of steel, more than 90% of all barrels made today use either …

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

QPQ Nitride vs. Chrome Lined: Which is The Better Barrel?

Posted by Gunbuilders.com on Jul 22nd 2025

Maybe you're buying your first AR-15, or upgrading your upper. Or maybe you're building one from scratch. Either way, you've figured out what specifications you want in your barrel -- length, gas system, twist rate, caliber -- except for one: What barrel finish will you choose? QPQ nitride or chrome …

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

How to Use a Maximum Point Blank Range (MPBR) Zero

Posted by Gunbuilders.com on Jul 8th 2025

"Holdovers? What holdovers?!" You ask, as you ring steel anywhere between the bench and a few hundred yards with no effort. What if you could just aim and fire at any target, and always hit near the center? That's what a Maximum Point Blank Range ("MPBR") zero does. Here's how it works, and how to z …

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

What is Bullet Grain Weight? How it Affects Accuracy

Posted by Gunbuilders.com on Jul 7th 2025

You see it every time you buy ammo: "55-grain 5.56 NATO," or, "147-grain 9mm." What does "grain" even mean? How does it affect accuracy, takedown power, and overall performance? When should you opt for heavier or lighter grain weights? Here are all the answers. What is Bullet Grain Weight? If you th …

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

The Best Barrel Length for 6.5 Creedmoor (With Ballistics Data)

Posted by Gunbuilders.com on Jul 2nd 2025

6.5 Creedmoor is perhaps the most popular 6.5mm cartridge on the market today. It's also the most popular AR-10 caliber, replacing .308 Winchester and 7.62x51 NATO as the favorite for long-range bench shooting in the semiautomatic platform. But to achieve optimal performance with any long-range cali …

DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

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