Reliability Upgrades for the AR-15

The AR-15 is America’s favorite rifle, with countless manufacturers producing models of varying quality. Fortunately, you don’t need to break the bank to make any AR-15 reliable. A few affordable upgrades can transform your rifle into a dependable workhorse.

Cheap, low-quality ammo can cause malfunctions in even the best AR-15s. Underpowered rounds, like some budget Russian steel-cased ammo, may lead to cycling issues. Instead, opt for reliable options like Wolf Gold or PMC, which offer consistent performance without a high price tag. Save the cheap stuff for practicing malfunction drills.

A poorly designed magazine can jam even a top-tier AR-15. Magpul PMAGs are a gold standard for reliability and affordability, but other quality options exist. Test one or two magazines with your rifle before buying in bulk to ensure compatibility.

The Bolt Carrier Group (BCG) is the heart of your AR-15 and often the first part to fail in budget rifles. Low-end BCGs may crack or fail after a few hundred rounds, especially if they haven’t been High Pressure Tested (HP) or Magnetic Particle Inspected (MPI). Upgrade to a tested BCG for $100-$150. Consider a Nickel Boron or Nitride/Melonite-treated BCG for reduced friction and easier cleaning. Regardless of the finish, always apply gun oil to keep it running smoothly.

A heavier-than-standard carbine buffer can improve reliability by ensuring the bolt fully seats, especially in a dirty rifle. It also slows the cycle rate, reducing felt recoil. However, a buffer that’s too heavy can cause cycling issues, so experiment to find the heaviest buffer your rifle can handle reliably. Carbines with shorter gas systems typically support heavier buffers than rifle-length systems. An H2 or Spike's T2 buffer is a good place to start on ARs with a carbine or mid-length gas system.

For rifles with questionable lower parts kits, or just peace of mind, a field repair kit is cheap insurance. These kits, often under $30, include small parts prone to breaking or loss, like springs and pins. Keep one in your range bag for quick fixes.