Looking over the ACOG brochures I received from the company, I note that they silhouette a comp ACOG mounted on the carry handle of an M16/AR15.  The mount is made in the forward hole of the carry handle, meaning the eyepiece actually begins forward of the A2 rear sight.

Assuming a 3x24 is mounted this way, how the hell are you going to use the scope, given its 1.4" eye relief?  Has anyone seen this setup, and how does it work?  The short eye relief of the 3x24 would seem to make this mount impossible to use without jamming your face almost into the A2 sight.

Thanks for any replies.

I had the same observation/problem with my mini-ACOG and had my gunsmith do two things:
- drill another hold in the carry-handle back further
- drill/tap another hole in the ACOG as to make it set back even further

Came out real nice and works great.

[img]www.imagestation.com/picture/sraid40/p5c8f3ac79aac3bfc21bd949003eb8aef/fd031ac6.jpg[/img]

I really had to contort my shooting stance to get it to work, because I was not as smart as drfcolt.  That is the way to go.  I think you might just be able to get away with the extra hole in the carry handle.

Trijicon lists eye relief for the 3x Comp ACOGs and 4x ACOGs at 1.5". While it is short, it is not THAT short. I own two of the three variations of the 4x ACOGs and owned the third. I have used the 3x Comp ACOG more than any other Comp ACOG. Eye relief is in reality, closer to being just over 2". It is short, but not that short!

I'm looking at picking up a 3x and will definitely get to a gun show or dealer before doing so, but I'm intrigued by arguy's post.  That extra 1/2 inch of eye relief can make a huge difference in CQB situations where the (usually) right eye would otherwise have to be extremely close to the optic and therefore less likely to pick up peripheral movement.

I noted on the "Show me your 4s" thread that one picture shows LarryG with his M4 in firing position, but his weld leaves his eye at least 3-4 inches from his NSN.  Two pictures of a young man show a more typical weld for a short relief scope (nose to handle).  I asked Larry whether he was just posing, or whether he really was sighting at the time, but haven't gotten a response yet.

With no disrespect to arguy and his input, can anyone else confirm a 1/2 inch or more variance from the official eye relief for their ACOG, and any comp ACOGs in particular?

Thanks for any replies.

Here is a picture of me (left) shooting a TA31 and Dirk_Pitt shooting a TA50-4. Both of these ACOGs are rated at 1.5" eye relief. I think you can see both of our eyes are more than an inch and a half.
[img]http://www.imagestation.com/picture/sraid44/pd096bd76f4de007a62e553eca9455c80/fcdc094d.jpg[/img]

Another picture of me with the TA31, clearly more than 1.5" of eye relief.
[img]http://www.imagestation.com/picture/sraid39/pce2f0b2dda3c46bb5bca6d987a1caf1e/fd073a0d.jpg[/img]

And another;
[img]http://www.imagestation.com/picture/sraid39/pa9b6dd4e86233514dd5b4c789b2220d6/fd073a6c.jpg[/img]

Getting the picture yet?
[img]http://www.imagestation.com/picture/sraid21/p26a3e2aaa91f57ea45bde066b8254b1b/fdb42788.jpg[/img]

Finally, here is a picture I put up once in a while when we are discussing this. Please bear with my ugly mug. But I took thie picture to show what the ideal eye relief for the TA31 is. If you get in closer than this, you begin to see a black ring which is the inside of the scope itself (too close) if you get out further than this, and you can without a problem, but you will not taking advantage of the full field of view.
[img]http://www.imagestation.com/picture/sraid25/pc85de006974c7a9a5c944579f70bbd4f/fd87dbbd.jpg[/img]

I have an ACOG-NSN and a compact ACOG 1.5x. The Compact is VERY forgiving with it's eye relief, although I expect that as the magnification goes up, the eye relief "forgiveness" goes down. My ACOG-NSN isn't very forgiving.

I was taught in the Army to shoot an M-16A1, by postioning my nose up against the charging handle. I don't think you actually have to touch it, but it is a good reference point.

All compact ACOG's have the BAC feature and you should be able to learn to use the scope with both eyes open. I find with both eyes open, using my ACOG, I still have good peripheral vision.

FYI, new-arguy seems to give rock solid advise, FWIW.  

Thanks for the pics.  EXACTLY the info I was looking for.

arguy:  RE that top pic, maybe R. Lee Ermey needs to square you away on the difference between left and right, "FMJ" style.  Jes givin ya sh*t.  [;D]

I am notorius for being a terrible speller, a terrible typer, always mixing my right with my left when giving or taking directions, and forgetting birthdays and anniversaries. Its just part of who I am. [img]http://forums.iroczone.com/images/smiles/dunno.gif[/img]