You want an
OPTIC. A
sight is the metallic peep that goes BEHIND the "optic," or at the end of a flattop rail.
<--- "sights"
Aimpoint - I run a Comp M2, a Pro, and T1, and even an old Comp M (1 - the FIRST Comp - has about 12 hours of battery life!
) on my .22LR AR Tactical Trainer, so I have a LITTLE bit of experience with them.
Pros - newer models have INCREDIBLE battery life. BATTLE-proven in Iraq & Afghanistan for 10 years now! LOTS of accessories, like rubber armor, killflashes, etc., and the QRP mount, which can save you some money. Easy on the eyes for the astigmatic set (which I am!).
Cons - cost; you DO need to pinch pennies for them, but they ARE worth it! Some models use 'funky' batteries (I consider anything OTHER than a AA or CR123, to BE a 'funky' battery), and those COULD be tough to locate in a grid-down scenario, and possibly tough to store on-board the rifle. After-market mounts available, but can easily add another $100+ to the overall cost.
EOTech - I have run both a 512 and a 557 in the past, so I have some experience with them.
Pros -
MOST affordable of the BIG 3 - used ones can be had around $200! Mount/s are built-in. Have also seen extensive use in the sandbox. Reticle remains visible in the largest UN-broken part of the glass, should the glass be damaged (keeps you in the fight!).
Cons - short battery life. VERY hard on folks with astigmatism (the ONLY reason I had to get rid of mine, and switch to Aimpoints - I
really loved them,
otherwise ). Smaller units require 'funky' batteries, too.
Trijicon - I did have a couple of their RX30-23 units for a while, and even ran a couple of introductory carbine courses with them - they held up VERY well.
Pros - rubber-armored, heavily shock-proofed. Large dot reticle is very easy on the eyes, and the amber dot is practically gold in color - GREAT contrast EVEN in bright sunlight for ME (some people DO complain of washout - I'm guessing they live in an AZ desert, because in the eastern forests of North America, it works GREAT for me!). Optic cost is very reasonable, and used you can get them GREATLY discounted. MULTIPLE mounting options available. Fiber optics
eliminate the need for a battery, although I've also owned a TX30 Tri-Power, which does take batteries!
Cons - mildot is 6.5 MOA, which bothers some people at distances beyond 50 yards. To that I say, the "C" in "CQB"
does stand for, "
CLOSE." Again, some people complain of washout in the sun - I've shot moving from complete shade to bright sunshine in ONE step, and it never washed on me. The tritium insert for nightwork is on the dim side, and has a 17 year guarantee. Ergo, it
WILL go inert,
eventually. Some mounting options (the ARMS #15, for instance!) are MORE expensive than others! The TX30 has funky batteries, short battery life, and dim Tritium.
In conclusion, there's up & down sides to EACH optic. The GOOD news is, NONE of them will break the piggy bank, if you save up long enough, and all of them have excellent warranties, good workmnaship, and are proudly made in the USA by established manufacturers who stand behind what they sell.
What it boils DOWN to is, DO YOUR HOMEWORK - find out whaich ones works BEST for you (and
yeah, you might do like
me, and go through
ALL of them, before you find what works BEST!
), and then practice, practice, practice with what you decide on!