• Magazine not inserted properly, re-insert magazine and ensure it is locked into place

  • Too many rounds in magazine, make sure magazine is not overloaded

  • Fatigued buffer spring, replace

  • Fatigued carrier extension spring, replace

  • Dirty and/or dry action, Field strip and clean rifle, including bolt carrier group, upper receiver assembly and barrel. Re-lubricate.

  • Dirty ammunition or dirty magazine. Clean magazine and use new, clean ammunition.

  • Defective magazine feed lips, spring. Discard and replace with new magazine.

  • Buffer assembly restricted. Field strip and inspect buffer tube and buffer assembly. Replace buffer spring if necessary.

  • Loose or misaligned gas block. Tighten gas block screws and ensure gas block is on straight.

  • Rifle over or under gassed, adjust gas block accordingly. If problem persists, call a qualified gunsmith or NEMO Arms, Inc.