16in M4 carbine A2 front sight post height

[adam1122]

Is there a standard height that I shoot begin my zeroing process at? Ive read alot about the different types of zeroing procedures I could use...I have a MATECH ranging sight on the rear and an Aimpoint on the top which I would like to co-witness with the front post.

Some say the screw in post should be level with the rest of the sight base? True or should I start taking some shots to see where they end up. Id like to be on paper before I take a shot if possible but I do not plan on laser bore sighting so Im not sure if this is even possible.

 

[Miles2go]

Re: 16in M4 carbine A2 front sight post height

I'm not a big fan of co-witness sighting, but my flip-up front on a Troy handgaurd is dead in the middle of my Eotech. That's where I'd start.

 

[Sterling Shooter]

Re: 16in M4 carbine A2 front sight post height

OP,

Typically, the Matech will be initially set for 300 meters with windage drum set at mechanical zero. The front sight post base should be flush with the deck of the front sight base. If your front sight base is an "F" marked unit your carbine will now have its sights set to where line of sight will be almost parallel with line of bore. If you do not have an "F" marked front sight base you will have some issues zeroing, since you'll likely be shooting initially about 10 MOA high, and, although this can be resolved by adjusting the front post up, about 2 revs, this leaves the post somewhat unstable. For better results, buy an extended height front post. At any rate, For full functionality of the BDC, first set the Matech as earlier stated to the 300 meter setting, adjust windage drum to mechanical zero, and make the front post's base flush with deck of front sight base. Then, zero at 25 meters for center of mass hits. BTW, the front sight has a value of 1 3/4 MOA per click, while the rear windage has a value of 3/4 MOA per click. Once you've centered your group to your satisfaction, you will have a bullet path which will intersect with the line of sight again at 300 meters, and full functionality for the Matech's BDC function out to 600 meters.

The Matech is a really magnificent sight. It gives you speed and versatility galore for a wide range of UKD and KD targets.

One more thing, initially, your perspective of both a perfect hold, as well as alignment consistency will likely be re-evaluated by your brain shot to shot; therefore, do not expect to shoot a small group or even a group at all. Also, my experience with new shooters suggests when you do make a sight adjustment you may get almost double effect for whatever adjustment you made; however, hopefully, this will only be temporary, with picture memory development helping you see things consistently. What I'm getting at here is that you may want to wait on sight adjustment until you are able to first shoot a relatively small group.

 

[adam1122]

Re: 16in M4 carbine A2 front sight post height

It'll be interesting to see how the first 5 shot groups. Figure I will either start at 25 or 50 depending on what's open. Gotta getbthenirons zeroed,the putmthemaimpointmon and zero that. I'll post some pics when available.