Upgraded a Streamlight M3 Tactical Illuminator. Read the instuctions and it will install under 7 minutes. Installed rechargeable LiFePO4 batteries versus standard batteries and works great! Wish it was lower in price. Saved a good unit and try this option.
Pros: Improves the unit tremendously
Cons: It's always the cost
This review was written in the old system and had content requirements that are different than reviews written today.