What is a Stripped Lower Receiver?
A stripped lower receiver is the ATF-regulated part of any AR-15 — the part with the serial number, the part you buy through an FFL. Here’s what it is, why it matters, and how to choose one.
7 Best AR-15 Stripped Lower Receivers [2026]: All Budgets
Every AR build starts with the lower. These are the billet, forged, and polymer strippeds worth starting a build on — plus the ones we’d avoid even at their discount price.
The 9 Best AR-15 Flashlights [2026] – Hands-On Tested
You can’t shoot what you can’t see. After hundreds of rounds in low-light testing, these are the weapon lights worth mounting — and the throwaways to skip.
Best Gun Cleaning Kits
A quality gun cleaning kit saves you from seized parts, corroded barrels, and $500 gunsmith bills. Here are the kits we actually use — from $30 pocket sets to professional range-day rolls.
10 Best AR-15 Drop-In Triggers: Single Stage, Two Stage, Competition & More
A drop-in trigger is the fastest AR-15 upgrade you can make — no gunsmithing, no fitting, just pins and a crisp pull. Here are the drop-ins worth the swap, from $180 budget to $350 competition.
AR-15 Direct Impingement vs Piston Gas Systems: What’s the Difference?
The evolution of rifle technology has been marked by significant milestones, one of which was the widespread adoption of piston-driven gas operating systems in military small arms. For decades, these systems, which channel a small portion of the gunpowder’s explosive force to cycle the weapon’s action, were the standard. They came in two primary variations:…
The 7 Best AR-15 Barrels to Upgrade Your Rifle in 2026
The barrel is the single biggest accuracy variable in any AR-15 build. These are the barrels we trust to shoot sub-MOA — from budget 4140 steel to match-grade stainless.
Common Thread Pitches
AR-15 thread pitch is 1/2×28 for 5.56 and 5/8×24 for .308 — but that’s just the start. Here’s every common muzzle thread spec and the adapters you’ll need for suppressors and muzzle devices.
The 6 Best AR-15 Bayonets of 2026: All Budgets
The 6 best AR-15 bayonets that actually mount and that you can actually buy, from the genuine issued Ontario M9 to a $38 budget blade. Which pattern fits your rifle, and how to tell if your AR even takes one.
9 Best AR-15 Complete Upper Receivers for 2026: Precision, Home Defense & More
From 5.56 general-purpose builds to .300 Blackout CQB and 9mm PCC uppers, a quality complete upper is the fastest way to add a new caliber or build a second rifle. Here are the nine we trust.
End of content
End of content