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80 Lower Blog

How to Zero a Rifle Scope (MOA and Mil)

How to Zero a Rifle Scope (MOA and Mil)

Posted by 80-Lower.com on Apr 14th 2023

Before you set up your new rifle scope for long-range shooting and target plinking, you have to make sure that shiny, new optic is zeroed. Today, we're covering how to zero a rifle scope. What is Zeroing?When you buy sights for your gun, you can't just throw them on, aim and shoot, and expect …

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 80-lower.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.


Holosun 507K: Unboxing, Review & Install (G43X)

Holosun 507K: Unboxing, Review & Install (G43X)

Posted by 80-Lower.com on Apr 5th 2023

The Holosun 507K is one of the most popular handgun red dots on the market, and the Glock 43X MOS is probably the most popular optics-ready, concealed-carry pistol available. There's some confusion about whether the 507K fits the MOS slide. We're clearing that up today with a detailed unboxing, r …

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 80-lower.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.


P80 (Gen 3) vs GLOCK (Gen 5) Slides: What's Different?

P80 (Gen 3) vs GLOCK (Gen 5) Slides: What's Different?

Posted by 80-Lower.com on Mar 27th 2023

We've covered the differences between the Polymer80 (Gen 3) frame, and the Gen 5 GLOCK frame. But what about the slides? Are their parts interchangeable? Can you fit a Gen 3 slide on a Gen 5 frame? Let's take a look.Gen 3 vs Gen 5 GLOCK Slides Compared For this comparison, we're looking at a …

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 80-lower.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 Assemble a GLOCK Slide (G19/G17 & Others)

How to Assemble a GLOCK Slide (G19/G17 & Others)

Posted by 80-Lower.com on Mar 24th 2023

Got a finished P80 frame? Want to upgrade your existing GLOCK handgun? A custom slide is the ticket. Here's how to assemble a GLOCK slide!  We're putting together a GLOCK 19 slide using one of our GLOCK build kits. These instructions are applicable for other slides, too, like 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 80-lower.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.


P80 vs GLOCK Frames: What's Different?

P80 vs GLOCK Frames: What's Different?

Posted by 80-Lower.com on Mar 24th 2023

Polymer80's frames -- and the handguns that are built on those frames -- have gained popularity among mainstream firearm owners. These frames and guns easy to customize, and they use GLOCK parts. But P80-based pistols are not identical to modern, Gen 5 GLOCK pistols. That's because they use "G …

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 80-lower.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 Serialize an 80% Lower

How to Serialize an 80% Lower

Posted by 80-Lower.com on Feb 22nd 2023

Under federal law, it's legal to make a firearm at home, for personal use, without a license. Most choose to build a firearm using an 80% lower: An un-serialized, unfinished firearm receiver. We're often asked if you have to put a serial number on your finished firearm. Let's cover whether tha …

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 80-lower.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.


We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.