My competition rifle uses a TA11 w/ JPoint (same thing as a Tasco Optima but better) mounted on top. My teaching rifle is similar except I use a TA01NSN. It still has the JPoint on top though.
As for a back up system. Any of the good manufacturers will do. ARMS, GG&G, et. al. Honestly though, if you're using an ACOG, you don't need it. The scopes are practically bulletproof.
Another option that works REALLY well is the
JP-SRTS. It his Short Range Tactical Sight. It's a nice option and is very fast to acquire in close up situations.
Here's when I would use what sight configurations:
1. If I was using an EOTech, I'd have back-up front and rear irons. Flip up on both, or just a flip up rear and standard front.
2. If I was running an ACOG or CQT (with the new reticle), I'd have the JP-SRTS, mounted, but honestly would probably never use it as if you're running a TA-11, you can train your eyes to ignore the magnification. If you have difficulty with that, the JP-SRTS is the way to go, but I'd replace the front sight post on the system with a front sight post that has a fiber optic insert. A lot brighter and you get a "dot" for CQB situations. Just rotate the rifle and shoot! I shoot with both eyes open all the time anyways.
3. If I was running a variable power or non-"tactical" scope (i.e. ACOG, CQT, EOTech) then, I'd definitely have the JP-SRTS installed and use it a lot!
This is for Tactical Division. The JP-SRTS in my opinion is a great option with little sacrifice. You can easily tap targets under 75 yards with it, without giving up anything in speed. Let your primary optic/sight system dictate what back-up system you use. Not the other way around.
That being said, I shoot Open division, 'cause I hate stuffing rounds into a shotgun. My open division setup is above. The old one was a 2.5-7x scope with an Aimpoint mounted on the handguard. That's replaced and I love what I'm running now.
Occasionally, I run in Tactical Division, but that's when I'm borrowing a friend's Browning Gold for the shotgun (gotta love that auto-load feature!!!). That rifle has only the ACOG on it. No iron sights....'cause the ACOG ain't gonna break.
Hope that helps.
SPC Richard A. White, Senior Medic
249th MP Detachment (EACF)
Camp Humphreys, ROK