Most helpful positive review
28 of 28 people found the following review helpful
Easy to use, just keep it screwed down
on March 30, 2013
In general: This is a good value red dot sight. I chose the 8 MOA for my Keltec KSG 12ga shotgun. I figured the practical range would be no more than 100 yards but more likely 25 yards. At 25 yards, the dot covers approximately 2 inches on the target, which I feel is very appropriate for a shotgun. As other reviewers have noted, you will probably want a riser if you are putting this on a weapon with a flat top receiver: I chose the "UTG Medium Profile Riser Mount with 3 slots" on Amazon for about $8.50 and have been happy.
Comparative shopping: I wanted the "heads up display" type of red dot (aka Trijicon RMR) over the "scope" type (e.g. Bushnell TRS-25). This Burris system is very similar in look and feel to the Trijicon RMR, but for less than half the price of the Trijicon. The biggest functional advantage the RMR has over the Fastfire III is the RMR has a motion detection system: the site will automatically turn on when it detects motion, and shutoff later. I see that as a clear advantage when something goes bump in the night and you reach for a gun with the RMR - the sight system is ready to go. With the Burris, you have to remember to turn on the sight when you grab your gun - which you may not do in a high stress situation. I find that an acceptable tradeoff, with the understanding that it shall be incumbent upon me to train switching on the site system when I reach for the shotgun. Training, training, training.
My first impression: the sight system is tiny: the lense is smaller than a quarter. It seems too small. However, once you have it mounted and you shoot with it, you will realize it is the right size afterall. I took care with the battery cap, and I did not have a problem unscrewing or rescrewing it as some other reviewers have observed. The description says "tool-less windage and elevation adjustments" which I don't agree with. The kit comes with a tiny screw driver, and you will need that or some other screw driver to twist the dials to make adjustments.
Second impression: I was able to quickly sight in the system at 25 yards by shooting a few slugs and making windage and elevation adjustments, then repeating the process. After about 5 tweaks, I was hitting bullseye or close each round and I was a happy camper. I found the autobrightness setting worked fine indoors. It always seems dimmer than you would expect, but it works and you forget about it. The manual (hi-med-low) settings can also be used but tend to be either too high or too low; I will probably stick to the auto setting for all future use. After about 40 rounds of mixed slug and buck, and I was very happy. Then I checked the UTG Riser and was shocked to find it was very loose - I tightened it with several turns on the set screw. Likewise, I then checked the Burris Fastfire III and found it was loose. After tightening it firmly with its set screw, I resumed firing the KSG and was frustrated to find that I was not even hitting the target at 25 yards. Suffice it to say, I will consider using Locktite or something similar after zeroing it in again.
Note: I have a pair of Magpul MBUS (Magpul Backup Sites) installed in tandem, just in case of the Burris's battery or system failure. They did not loosen from 40 shotgun blasts, and were still on zero.
A final observation. At full brightness, the user can see that the red dot is not in fact a single red dot. It is more like 6 or 8 tiny red dots arranged in a star type of pattern. I noted right away the star in my system is not even, that is to say, not symmetric. It seems a little deformed, or smaller on one side. I was worried when I first noticed that after powering the system on. I worried that it was a sign of poor quality control at Burris and perhaps there would be usage problems. In fact I found that isn't the case. In both outdoor and indoor range usage, I found when staring through the sight at a distant target, the red dots become a red dot, and the human eye is no longer distracted by the sight system itself a few inches away.
I like this sight system enough that I will probably buy another 8 MOA for a handgun if I ever buy a handgun with a rail system on the top. I recommend a 3 MOA for anybody with a rifle.