Failure to Feed

A failure to feed (FTF) is a malfunction where a cartridge fails to properly feed into the chamber from the magazine during the cycling process. This stoppage occurs when the bolt carrier group attempts to strip the next round from the mag but cannot fully seat the cartridge in the chamber, leaving your firearm unable to fire.

Common Causes of FTF in AR-15s

Several factors typically contribute to failure to feed issues in AR-15 rifles:

• Magazine problems: Weak magazine springs, damaged feed lips, or improper mag seating account for approximately 60% of FTF malfunctions
• Ammunition issues: Out-of-spec cartridges, damaged casings, or incorrect overall length
• Feed ramp geometry: Rough or improperly polished feed ramps that impede smooth cartridge transition
• Undergassed systems: Insufficient gas pressure to fully cycle the bolt carrier group
• Worn recoil springs: Springs below 17 pounds typically struggle to return the bolt into battery

Prevention During Your Build

When configuring your AR-15 on the AR15 Outfitters builder, consider these factors to minimize FTF risk:

• Select quality magazines from proven manufacturers (Magpul PMAGs, Lancer, OKAY Industries)
• Ensure proper gas system length matches your barrel length
• Choose barrels with properly machined M4 feed ramps
• Verify buffer weight compatibility with your gas system

Immediate Action Drill

If you experience a failure to feed at the range:

1. Tap the magazine firmly to ensure proper seating
2. Rack the charging handle vigorously to eject the stuck round
3. Reassess and attempt to fire

Understanding FTF malfunctions helps builders select compatible components and troubleshoot issues effectively, ensuring reliable function whether building a first pistol or competition rifle.