If you’ve read our P320 Build Guide, then you’re probably wondering how to easily convert your newly built Sig Sauer pistol between its various sizes, barrel lengths, and calibers. That’s accomplished by swapping the P320’s fire control unit — the part legally considered the firearm itself — into a new grip module. What are P320…
Red dots, holographics, ACOGs, Aimpoints, what does it all mean?! Today, we’re going to clear up the misconceptions and mysteries about red dot optics. Let’s clear up what types of red dots there are. Then we’ll compare how each type works, and its pros and cons. Lastly, we’ll dispel some myths and misnomers about laser…
300 Blackout is an impressive cartridge: It can be fired suppressed or un-suppressed, subsonic or supersonic, with no modification to the rifle or pistol that’s firing it. But to make sure your 300 BLK-chambered AR can shoot both supers and subs with good accuracy and reliable cycling, you’ve got configure it the right way. This…
Installing the lower parts kit in your AR-15’s lower receiver should take less than two hours for first-time builders. This guide will illustrate how to perform each assembly and install step with pictures and written instructions. We strongly recommend finding the right tools before you get started, lest you end up with missing roll pins…
Thanks to easy customization and the invention of the pistol brace, the AR-15 pistol has become a popular alternative to building or buying a traditional rifle. Many also build AR pistols as an affordable alternative to owning a short-barreled rifle (SBR), an NFA firearm that requires ATF approval, registration and fingerprints. (The SBR tax was…
You bought or built a shiny new AR-15. Congratulations! But it looks just like every other AR out there. What do you do? You paint it. But how? Easy: We’re going to show you how to use Duracoat – a popular gun coating that now comes in a rattle can – and some simple vinyl…
Just bought a red dot sight? You must zero the reticle so your point of aim (POA) matches your bullet’s point of impact (POI). When you install your new red dot, chances are POA will not match POI. Your rounds may land low and left, high and right, or any combination thereof. Getting POA to…
![The Ultimate AR-15 Sling Guide + Top Picks [2023]](https://80-lower.com/wp-content/uploads/2021/07/the-ulimate-ar-15-sling-guide-and-top-sling-picks-2021-768x333.jpg)
A sling makes carrying your AR-15 easier. It allows for quickly switching from your rifle to a sidearm, too. But most of all, a good sling is a valuable shooting aid. It improves accuracy and stability without a bench or shooting rest. With the right sling, you’ll nail shot placement and reduce felt recoil and…
The AR-15 is equally capable of chambering 300 Blackout and 9mm Parabellum. Both cartridges can function as supersonic and subsonic loads with short barrels. Both can be effectively suppressed when loaded as subs. Both provide similar AR configurations to accomplish this. So, 300 BLK is a pretty direct competitor to 9mm when it comes to…
We talk a lot about building ARs from scratch. But what good does that new rifle or pistol do you, if you can’t effectively send those rounds downrange? If you’re a new shooter or builder, chambering that first cartridge and pulling the trigger can be intimidating. It’s not embarrassing to admit it. We’ve all started…
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.
