AceTech Bifrost BT Rechargeable Tracer Unit (Color: BlacK)

"I bought my Bifrost in store about 2 weeks ago so my review will only be for first impressions.

I really really really enjoy using this acetech bifrost tracer unit.
It is super tiny (about 3 inches long)

I really enjoyed being able to check my FPS on my own without a chronograph.
Im clumsy, so I have already dropped it a few times on concrete. It has suffered no visible damage.
I have also used it on a gas handgun and it worked fine. It did fall off because I didn't notice the handgun had different threads lol.
the only downside to me is that I have to screw it on and off to turn it on or off.
It is great for the casual weekender. 5 of 5 starts on usability 5 of 5 on build quality ( I have already dropped it, put it on crooked,( put it on backward) shot the inside, and shot the charger by accident... not a single issue. ( I'm not saying be like me but if you are, it can seemingly handle it.)

The muzzle flash is amazing and works with any bbs (duh) It works with both green and red (even tho the manual states only green)
I enjoy the Dynamic option so I can shoot rainbows or the counter feature so I know when I'm low on ammo.