Good starter for sight alignment - Sightmark Laser Bore Sights

Great tools to align both iron sights and red dots. It may not be perfect and most will hope to rely solely on this, but you will need to fine tune at the range. These should get you close depending on how you setup initially.
I’m very impressed so far, but will confirm when I get to range. But even with rotating the unit within the barrel, it is not far off in accuracy that can’t be mitigated quickly. Especially if you setup properly at 10 yards in your home, etc.
You may need to have a cleaning rod or something to push it out of the chamber from the barrel end depending on tolerances.
I will be ordering more for other calibers.