Whats up KAOTIC??
The RRA is a fine company, dont let anyone sway you, or talk you down on RRA... their one of the best. Great Manufacturers are also BUSHMASTER, ARMALITE, and COLT. You cant really go wrong with any of the companys listed above.
The mid length handguards would limit your choices on RAIL systems such as those three rifles in the TEAMXBOX thread. (The rail systems replaces the handguards and allow you to attach all sorts of gadgets on the rifle such as grips, lights, and foreward mounted optics such a sred dots). So if your looking to trick out your AR with lights, lasers, and everything else (except a scope, they dont really go on the handguards >=), you may want a CAR length handguard or full length for rail options. Also of note is that a red dot would fit just fine on the receiver, and if you wanted it mounted farther down the gun... you could buy an extension. Im gonna tell you right now, the RRA detachable rail was MADE for a red dot optic called an AIMPOINT. It is a great red dot, and it fits perfectly (or so I hear) on the detachable carry handle rail that comes standard with the RRA you want. (you do know the rear sight and rail comes off right? Even more room for optics! yay!) If you dont want to buy the rail, you save $100 bucks but also lose IRON SIGHTS. This means you need to buy an optic off the bat, or buy an BUIS (back up iron sight, or Flip up iron sight) to replace it.
Aimpoint
[img]http://www.aimpoint.com/products/compml2/compml2.jpg[/img]
Dont be confused, the rifle is a CARBINE, but it has handguards that are mid length. The barrel is still 16 inches, midlength handguards or shorter CAR length. Go with a model with CAR handguards for more rail options as discussed earlier. The rail is just for people who like to trick out their rifles though, and without it you could still set up oodles of optics without a problem. Rails for the handguard accept red dots the best, as obviously a 2x or xx scope would be a bit too far to see through!Red dots can be mounted foreward almost as far as you want, and some people prefer the red dot on the hanguard, others prefer it on the "body" of the gun where scopes and optics normally are.
Since its a carbine, RRA allows you to chrome line the barrel as an option. I suggest you do that, as the barrel will last much longer. Unless your concerned about MAXXIMUM accuracy, stay away from non chromed barrels. Chrome lined barrels are PLENTY accurate for target shooting though. Chrome is great!! Cleans easier too!
Also, if you choose another company, they may offer a rifle with a muzzle brake. A muzzle brake is a attachment on the end of the barrel that looks like a flash hider, but is quite different. It vents gas to the side of the attachment, and reduces recoil. The AR-15 is a very low recoil gun off the bat... so its not really needed. If you do get one, expect less muzzle rise and recoil, and also expect more NOISE. It can seriously make your rifle intolerable to people around you, it will be LOUD. LOUD LOUD LOUD. If your just shooting by yourself, then it wont bother people around you, so it wont matter. The noise does not affect the shooter so much as those off to the side of you.
A2 upper, AKA carry handle upper. This is what I have, its a carry handle that is NOT detachable. Its the same configuration as m16s you see in the movies... usually. This config really limits your options as far as optics. It makes you mount them really high on the gun, and well... that sucks. The lower you can get the scope to the barrel the better. You can get nice optics for it, but your kinda limited with room. A drop foreward red dot is a good option for the A2. (Its a rail that fits on the carry handle, goes down the front and over the handguards, hence a Drop Foreward). Since I am a traditionalist, I like my A2 16 inch carbine.
A2 20 inch
[img]http://www.rockriverarms.com/images/a2standard.gif[/img]
Also, if you are looking at other models, stay away from anything with CAST parts. Notable gun is the OLY arms PLINKER. Stay away from cast parts, cast receivers, cast anything.
Stay away from .223 chambers. They wont shoot 5.56x45. A 5.56x45 chamber will shoot .223 though. RRA offers a .223 "WYLD" chamber and it will shoot both. Target guns usually have .223 chambers... IE varminters, DCM rifles... .223 chambers may explode if you put 5.56 in them!!
The gun your looking at will handle both fine bc it has the .223 wyld chamber.
Note: A 20 inch barrel gives you the most "power" from the 5.56x45 or .223 round.
Obviously a longer barrel allows the gas to be used more effeciently and get more speed out of the projectile. The more speed the 5.56/.223 gets, the better it fragments in tissue. So if you want MAXXIMUM alien/monster/nazi stopage, go with 20 inch. 16 inch is also a very good length for a defensive rifle, especially indoors. Also, a longer barrel does not = more accuracy. It may help YOU shoot better by having more weight (thus small movements your body makes do not disturb your gun as easily) but if a nice 16 inch and nice 20 inch were clamped down, they would have the same accuracy.
One would shoot faster than the other though, because of the longer barrel length.
SKIP OVER THIS IF YOU DONT CARE ABOUT GETTING INTO FIREFIGHTS OR TRAJECTORY!!!!
LAST CHANCE!! ITS CONFUSING.
The faster a bullet shoots, the better for combat.
Picture this.
Imagine a laser... its flight path does not arch. If you aimed at someone 100 ft away, or 900 meters away, you would still hit them without sight adjustment.
0= targets/nazi's/bigfoot/enemy soldiers.
-- = bullets flight path
*LASER EXAMPLE*
200m 100m 50m
--------0-------------0------------0--- U
Now a football, whos trajectory is arched.
It would require sight adjustment to hit targets at different distances.
FOOTBALL EXAPMLE Note ==== is AIR... wont work otherwise.
=============== - - - =============
======== - - =========- - ======
===- 0- ====0========0=====0 - U< You
++++400M+++300m+++++200m+++100m
See those guys in the middle? The football went over their head. Sight adjustment would be needed to hit them, but to hit the man at 200 meters would mean the bullet would hit the ground at 300m... and so on. So in other words, the FASTER a bullet is, the flatter its trajectory becomes. AR15 example: (The data is not exact, but its a real example) 20 inch rifle, Sighted in at 50m. The bullet rises as it exits the barrel, and hits point of aim at 50 meters. It rises 1 inch above the barrel at 150 meters, as it reaches the height of its trajectory it begins to fall, and at 200 meters hits point of aim again. At 250 meters its an inch bellow point of aim. 300 1.5 inches below the point of aim. Get it? A man sized target would get hit in the vitals if you aimed at the chest up to lets say 0-300 meters. A slow bullet may need to be arched over the heads of baddies at 150 meters to hit someone at 300 meters. I have absolutly no idea why I told a newbie this... Uh, if your not worried about shooting man sized targets out to 300 meters and getting kill shots, then the barrel length wont matter. >=) 16 inch still has a flat enough trajectory thanks to the superior ballsitics of the 5.56x45/.223 Remember, the faster this perticular round is, the better it will fragment in tissue.
^In sum from the above^
20 inch = more ownage of the bad guys at extended distances. 16 inch is great too! It will own bad guys just as well and its trajectory is good enough for a firefight. Heck you can clear houses easier too because its smaller! >=) If you read that and are crying because how confusing things have become, im sorry. Dont let it keep you up at night. 16 inch is great (its what I own).
Good day!