Latest Upper Receivers

Special Purpose Rifle (SPR) Basics with Ridgeline

Just what is a “Special Purpose Rifle” or SPR and why are these sorts of AR builds becoming increasingly popular? To find out more we reached out to Alex Hartmann from Ridgeline. His company focuses heavily on long-range shooting, as well as producing high quality, ultra reliable Special Purpose Rifle (SPR) builds. We talk with Alex about what Ridgeline offers, precision shooting at distance, and what makes for a high quality Special Purpose Rifle (SPR) build.

Riflespeed Gas Controls – An ARBuildJunkie Q&A

We recently sat down with Kyle Lynch of Riflespeed to discuss his approach to the adjustable AR gas system, called the Riflespeed Gas Control system. We discuss how the idea came about, issues with other adjustable gas systems, and why he feels Riflespeed’s Gas Control system has the potential to change the approach of AR manufacturers in the years ahead.

Rubber City Armory Blacknitride+ Bolt Carrier Groups – An ARBuildJunkie Q&A

We recently sat down with Jeff Larson, director of operations at Rubber City Armory, to discuss his company’s Blacknitride+ bolt carrier groups. Purchasing a quality bolt carrier group is one of the most important things you can do to ensure you have a reliable firearm. With many of our go-to bolt carrier groups hard to come by, we recently purchased a Rubber City Armory bolt carrier group for a build and were very impressed with its quality and its glasslike black nitride finish.

Hodge Defense Systems – A 2021 Update with Jim Hodge

We recently sat down with Jim Hodge of Hodge Defense Systems to discuss the recent launch of the new Spine Lock (S-Lock) Rail System, the company’s plans for the year ahead, his take on the brand’s growing popularity, and why we should consider being kinder to each other online as we discuss our favorite firearms.

Best AR-15 Foregrips – An ARBuildJunkie Guide

When it comes to adding accessories to a rail or handguard, one of the first things most shooters look at is a foregrip of some sort. However, tackling the subject of which foregrips are the best is far more complicated than it seems at first glance.

Bootleg Inc. and the Bootleg Inc. Adjustable Bolt Carrier

We recently sat down with Andrew and Becca Pike of Bootleg Inc. to discuss the company, products they offer, including their Lightweight Adjustable Carrier, which features a four-setting vent system, making it ideal for both suppressed and unsuppressed ARs.

AR Bolt Carrier Group Basics with Mike Mihalski of SOLGW

With so many buying ARs of varying levels of quality, we felt it was a good time to reach out to Mike Mihalski of Sons of Liberty Gun Works to discuss AR Bolt Carrier Group basics. Read on to learn about the basics behind why a quality bolt carrier group matters, and why you might consider an upgrade if you are uncertain about what you’re currently running in your AR.

Adjustable Gas Blocks – School of the American Rifle

adjustable gas block

Chad from School of the American Rifle talks adjustable gas blocks. What are the caveats of using an adjustable gas block on your next AR build? What to look for in an adjustable gas block, and why a gas block that offers tactile feedback is preferred. Chad demonstrates how to prevent an adjustable gas block from becoming carbon locked, and shows us an example of what happens to a adjustable gas block if it is not properly maintained over time.

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