Why 300 BLK is Better Than 5.56 NATO (Ballistics Data!)

Posted by gunbuilders.com on Jun 11th 2025

It's true: 300 AAC Blackout is, in fact, almost universally superior to 5.56 NATO and .223 Remington. We've got the ballistics data to prove it, too. There's just one, specific circumstance in which 5.56 or .223 is "slightly better", which we'll cover below. So, if you're on the fence about which ca …

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.

Billet vs. Forged Lower Receivers (Yes, One is Better)

Posted by Gunbuilders.com on Jun 9th 2025

We sell a lot of AR-15 jigs and AR build kits. So, we're f requently asked which lower receiver's better for building an AR: Billet or forged? Plenty of builders will tell you that it's entirely up to personal preference -- that both types of lowers are basically identical when it comes to performan …

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 AR-15 Ejection Pattern Chart, Explained

Posted by Gunbuilders.com on Jun 2nd 2025

Does your AR-15 feel like it produces excessive recoil? Or do you frequently wind up with short strokes and jammed casings? Your AR-15 might be over-gassed or under-gassed. You might need to swap your gas system, or install a lighter or heavier buffer. Thankfully, there's an easy way to figure all t …

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 the Bufferless AR9 Works

Posted by Gunbuilders.com on May 27th 2025

The 9mm AR, officially called the AR9, provides a compact solution that allows the AR platform to ditch its gas system and, more importantly, its buffer system. One of the stubborn pains the AR-15 and its many variants suffer from is the buffer tube. It's necessary for the bolt carrier group to cycl …

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 Take Fingerprints For an NFA Application

Posted by Gunbuilders.com on May 16th 2025

We recently covered how to register a short-barreled rifle with the ATF, as part of the National Firearms Act (NFA). One of the most important -- and, for many, complicated -- parts of the process is acquiring a set of fingerprints to provide with your Form 1 or Form 4 application. But getting finge …

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 Register an SBR (2025 eForms Instructions)

Posted by Gunbuilders.com on Mar 17th 2025

So, you're ready to ditch that 16" upper and pistol brace. Or maybe you're building a fresh rifle from scratch, and you need to register your receiver before you install a buttstock. Here's how to register a short-barreled rifle (This Covers Form 1 SBRs) Note that these instructions cover how to fil …

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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