If you're considering the LabRadar I highly recommend doing your research. They're a great "idea" but unfortunately they don't always work as advertised. Don't just read or talk to the people with good reviews. There are a lot of VERY frustrated LabRadar owners out there and for whatever reason the LR drops or misses shots, sometimes frequently.
Over on another forum I've read where guys got so frustrated with the LR unit and the lack of support from the company that makes them, one blew his up with tannerite and the other kicked his to pieces. That's not a joke and both provided pictures of the end result.
No Chronograph is perfect, they, ALL, have their pros and cons. For ease of use/setup and never misses a single shot, IMO, the MS chronographs are hands down the winner, but they can affect POI. I've been using a MS chrono since they very first came out and never had one affect group size though. As was already mentioned, pretty much any time you hang something off or screw something on, the end of the barrel it's going to change POI but that doesn't mean it affects groups. I've never had a muzzle brake, not, affect POI and my suppressors generally change POI a fair amount, but neither of those has ever affected group size either. On my guns, attaching a MS bayo has always changed POI much less than adding a muzzle brake and a suppressor.
