I went to Elm Fork this afternoon with a “honey-do” list...... Honey being my new rifle.
First Task: mount and zero the A2 carry handle and front sight. I used the official 25 meter M16A2/A4 sighting in target.....first time I’ve ever fooled with one of those. Here’s what it looks like:
The reverse side of the target is registered and marked for sighting in M4s instead of M16s. It worked pretty well. Just as advertised, in fact. The problem was in the user software, not the mandated processes or hardware. I got the front sight elevation sorted out, but when it came to the windage, I had a senior moment that lasted about 90 minutes.....and I couldn’t for the life of me remember whether to turn the rear sight left or right, if I wanted to shift the point of impact to the left. It was the oddest thing, and the adjustments didn’t seem to do what I wanted them to do. All logic fled me, and I couldn’t even think of trying to look up the instructions on my phone. Too much time in the sun? Who knows. Anyway, I did get it figured out eventually - that is to say, I got it properly zeroed, but the only problem being that to this very moment, I still can’t remember which direction to turn the windage knob to shift the point of impact where I want it to go. HOWEVER
, I did manage to record exactly how hard to torque the side screws down when mounting it, and
the screw position, before loosening them again to remove the carry handle and put it in my pack.....where it will stay pending an emergency need for another rear iron sight. With that information recorded, I could remount it if necessary and get back pretty close to the previous zero. Here’s what the carry handle sight looked like:
Next Up: mount and zero the MaTech rear BUIS - which is what will stay on the rifle most of the time. That was a piece of cake. If you don’t own one of these, you should. It was the easiest rear sight to adjust I ever worked with. The front sight was already copacetic from zeroing the carry handle sight, so I didn’t have to fool with that. And the MaTech rear sight allows adjustment for both windage AND elevation. So if your front sight post is properly adjusted, your done. I simply set the elevation knob to the zeroing mark between the 300 and 400 meter marks, verified that elevation was spot on, and then adjusted the windage knob a couple of clicks, and BINGO! I was dead center for a 300 meter zero. Here’s what the MaTech rear BUIS sight looks like:
Third Task: mount and zero my 4x32 BAC ACOG in front of the MaTech rear sight. Again, using the 300 meter point on the tip of the BDC post, but below the chevron (see image below), and aiming at the same 25 meters sighting in target, I was quickly able to get the ACOG to putting rounds dead center in the little silhouette in the center of the target.
My eyes being what they are, I obviously shot best with the magnified optic. But I also did reasonably well with the MaTech BUIS. I did the worst with the carry handle rear sight. I’m not sure why, unless it is the fact that the handle itself obscures some of the target, while MaTech does that less completely. I don’t know for sure, but I do know that I was much more confident with the MaTech sight. OTH, the carry handle sight was pretty much indestructible. So it has that going for it.
How did the rifle shoot? Not too bad at all for a gov’t profile barrel, and not being free-floated. It’s not a sniper rifle, but with the M855 ball I was shooting exclusively, I’d call it a legitimate 2-3 MOA rifle - so within mil-spec. I’d like to try shooting some 69 and 77 grain OTM through it just to see if it makes much of a difference, but I’m quite happy with the rifle’s performance. It never had a single malfunction of any kind. BCM makes really quality stuff, and the heart of this beast - the BCG, upper receiver, barrel, and fixed front sight were all BCM stuff. I came way with the impression of anvil-like reliability. I really, REALLY like this AR.
Now, on my next trip to ETTS, I’ll see about properly confirming the 300 yard zeros.