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Builder's Guide to AR-15 Gas Systems

Posted by 80-lower on Dec 11th 2019

Builder's Guide to AR-15 Gas Systems
This next section of our  Master Guide to AR-15 Parts for builders dives into the components and functions of the AR-15's gas system. Learn the differences between direct-impingement and pis … read more

Builder's Guide to AR Bolt Carrier Groups

Posted by 80-lower on Dec 9th 2019

Builder's Guide to AR Bolt Carrier Groups
The bolt carrier group (BCG) is one of the most important moving parts in the AR-15. It takes the brunt of the recoil produced by the gas system while reliably cycling and ejecting ammunition. This … read more

AR-15 Parts: The Builder's Master Guide

Posted by 80-lower on Nov 26th 2019

AR-15 Parts: The Builder's Master Guide
The AR-15 is arguably the most popular firearm bought and sold in America. You love the Second Amendment just as much as we do, and you want to own one. There are two ways to join the club and this … read more

All 80% Lowers & Frames Compared (2019)

Posted by 80-lower on Nov 22nd 2019

All 80% Lowers & Frames Compared (2019)
You're ready to become an at-home gunsmith! This project requirespicking up an 80% lower of some kind. This is the unfinished firearm receiver -- the ATF calls them receiver blanks -- that you must … read more

AR Receivers: 7075 T6 vs. 6061 T6 Aluminum

Posted by 80-lower on Nov 14th 2019

AR Receivers: 7075 T6 vs. 6061 T6 Aluminum
The most important part of the AR-15, the lower receiver (the firearm itself) comes in two versions: Billet (6061-T6) and forged (7075-T6) aluminum. If you're here,  you're probably goi … read more