When you start trouble shooting it's important to go at it with an open mind. You want to consider all parts to ensure the potential problem isn’t accidentally overlooked. It’s important to keep in mind the potential for tolerance stack-up. It is possible for all parts to be within proper specifications but when stacked together, the whole unit is out of tolerance (due to some parts falling within tolerance minimums and others within tolerance maximums). For this reason we recommend a certified armorer or gunsmith confirm the completed unit is within proper/safe tolerance. At BA we strive to hold extremely consistent, optimum dimensions to avoid any tolerance stack-up issues.
- Visually inspect parts for debris
- Bolt Face
- Upper Receiver
- Lower Receiver
- Confirm gas tube is installed correctly and not bleeding at the gas block (some leakage is normal).
- Confirm gas tube is properly aligned and not binding on the barrel nut, upper receiver, or gas key.
- Confirm gas is not leaking significantly from around the gas block journal (some leakage is normal).
- Confirm gas block is properly installed over the gas port hole in the barrel.
- Confirm hammer and trigger pins are not broken or walking out of the lower receiver.
- Confirm buffer is not binding in the Buffer Tube.
- Confirm charge handle is not bent or binding.
- Confirm BCG isn’t dragging in the upper receiver or charge handle channel.
- Test fire with multiple mags to ensure it’s not a mag problem.
- Test fire with multiple factory loads to eliminate ammunition issues.
- Group your rifle with multiple ammunition loads.
- Test fire with the muzzle device removed.
- Confirm barrel nut is properly torqued.
- Confirm Scope and rings are tight and properly installed.
- Confirm consistent body position and trigger pull.
- Confirm stability of rifle rest.