It's no secret that ACOG rifle scopes are some of the most expensive mid range optics. They are popular choices for fixed focal power on AR-15 rifles. There are also many variants of the ACOG with different reticles, bullet drop compensation, and focal powers.
Each model has their strengths and weaknesses. I choose the put the ACOG TA-33 .223
on my rifle for several reasons:

• Size
• Weight
• Clarity
• Durability
• Eye relief

Some of these features are not specific only the TA-33, but I thought they were worth mentioning. The size and weight of these optics are nothing short of amazing. The materials used allow the optic to perform in a very compact form. The TA-33 is one of the best optics on the market for its weight. The smaller size allows for less crowding on top of the gun which gives shooters a less obstructed view downrange.
The clarity of ACOG is phenomenal. The glass is clear and bright; even in low light. The combination fiber optic/tritium system does a great job of illuminating the reticle.
ACOGs are known for their outstanding durability which means they can be dropped and banged without worry. They can stand up to full-auto fire and are also submersible.
Above all, the reason I choose the TA-33 was the eye relief. While it only has a 3x power instead of the popular 4x on the full size ACOG, the longer eye relief makes it a more versatile optic. I can "almost" use it like a red dot sight (with some parallax). The long eye relief allows me to take quick shots on target with a consistent check weld. If I need to make a longer shot, I can tuck the gun in a few inches closer to get a better view downrange.
Expensive? Oh yea, but this is one of those buy once cry once situations. I've talked to a lot of shooters over the years, and I've never met one who says the regret buying the ACOG.