Gunsmithing

The Heartbeat of Reliability How the BCG and gas system interact, direct impingement vs. piston, and maintenance tips for reliable function. If the AR-15 is a human body, the Bolt Carrier Group (BCG) and gas system are the heart and lungs. They convert fired gas into the mechanical energy needed to cycle the rifle. Choosing…

Protect, Cool, and Mount Why free-float handguards improve accuracy, how to choose M-LOK vs. KeyMod vs. Picatinny, and heat considerations. Handguards do more than make the rifle look good. They protect your hands, interface accessories, and — with free-float designs — can improve accuracy. Free-float vs. drop-in Drop-in handguards are easy and cheap but can…

Learn what upper and lower receivers do, receiver compatibility, and tips for choosing forged vs. billet. The AR-15 splits its function across two main assemblies: the lower receiver (fire control, magazine, buffer system) and the upper receiver (barrel, handguard, bolt carrier). Understanding their roles is essential when building or upgrading. Lower receiver Legally, the lower…

The Importance of PCC Headspacing When it comes to building or maintaining a Pistol Caliber Carbine (PCC), one of the most critical—but often overlooked—factors is proper headspacing. Whether you’re running 9mm, .40, or .45 ACP in your PCC, headspacing is what ensures your firearm runs safely, reliably, and accurately. 🔧 What is Headspacing? Headspacing refers…