Product review (5 stars): Outstanding
Outstanding!
I have one of these mounted forward on an AK, and it is solid, bright, and reliable. A friend referred me to this brand.
Another post mentioned there was no difference between some of the brightness settings, but mine works perfectly.

You can slightly see the LED mounted inside, but it is mounted in that position for a reason and did not interfere with aiming and shooting.

After about 100 rounds it has held zero just fine.