BUIS Placement

[TripleDigitRide]

When installing BUIS on a mid-length AR, are there specific locations they should be attached?

Thanks.

[R1100R]

You will want the longest site radius possible. Depends on the set up. Your rear is just before(in front of) your charging handle when closed. Do you have a railed hand guard or a fixed front site?

Edited January 19, 2013 by R1100R

[TripleDigitRide]

Flat top upper with mid-length free-float railed handguard. The handguard extends an inch or so past the low-profile gas block. No fixed front sight. I'll be using front and rear Magpul MBUS.

[R1100R]

Then set it out on the end so the tip of the front sight base reaches the end of the rail.

[Dolomite_supafly]

What kind of sights?

The 600 yard Matech are for a carbine length gas system. If you have something else it can affect it. Enough to cause a miss, I am not sure. For regular irons just zero at 25 yards and it will be point a pull out to 250 yards which is well within the normal ranges for Tennessee. If you do a 100 yard zero you reduce that "point and pull" range to a little over 200 yards. I know with a 25 yard zero you will stay within about 6" to 375 yards with M855. It will be 5" high at 100 yards, 6" high at 150 and 200 yards, 5" high at 250 yards, 3" high at 300 yards and 4" low at 375 yards.

 

Dolomite

[TripleDigitRide]

Awesome. Will do. Thank you.

[R1100R]

I have been using a new 50 yard zero. It works well for me. Below is a good source for different zero's at different ranges.

It's a good read. All of them have their merits.

 

TDR is using a set of Magpul's. BTW I have used a MATECH on a mid length and it worked fine for iron sights.

 

http://www.m4carbine.net/showthread.php?t=65679

[Dolomite_supafly]

If some uses a scope and planes on dialing adjustments I tell them to do a 100 or 200 yard zero. The reason is you will always be dialing in one direction, up. If you do a 25 yard zero with a scope you will get confused because you will dial two different directions, up and down.

Iron sights are great, as are red dots, inside of 300 yards. It is basically aim center mass and fire.

Dolomite