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.

The Best Barrel Length for The AR-9 (With Ballistics Data)

Posted by Gunbuilders.com on Jun 27th 2025

When it comes to building a pistol-caliber carbine using the AR platform, 9mm is the best cartridge. It's a high-capacity round that needs no gas system and produces almost no felt recoil. It can be suppressed with subsonics, or it can maximize 9mm's velocity to push the limits of what your AR9 pist …

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 300 Blackout Barrel Length (With Ballistics Data)

Posted by Gunbuilders.com on Jun 25th 2025

The best overall barrel length for .300 Blackout is 10.5". There you go! You can leave now. But you probably want to know why this is the optimal barrel length, especially if you're building your next AR-15. We've got the ballistic data comparing 300 Blackout barrel lengths and velocities to illustr …

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 AR15 Deer Hunting Calibers, Compared

Posted by Gunbuilders.com on Jun 18th 2025

Yes, you can hunt with an AR-15 in most U.S. states. The AR platform is excellent for building a lightweight, accurate hunting rifle that can easily be configured to adhere to some states' hunting restrictions on magazine capacity and calibers. Unlike most bolt guns and deer rifles -- which need to …

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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