Originally Posted By Twobravo:
Originally Posted By Forest:
Answer to yourself why would you be putting a low to medium power scope on a 14.5" carbine?
I'd rather answer it here. I didn't know 3-9x40 was considered low to medium power. Even if it is, that seems like a good compromise for unknown shooting distances out to about 400 yards.
I guess I need to see what your definition of a low to medium power scope is. Also, would it make a big difference if the carbine had a 16" barrel? Maybe I'm not understanding where you're going. Please continue though.
There may be nothing wrong with your scope choice. I 'think' Forest' point is that 14" barrelled AR's are generally used for such things as cqb/urban war fare and some sort of red dot/low power scope might be a better choice.....something that you can get on target much quicker. You might share what type of shooting you intend to do.
So far as accuracy, there is a school of thought that shorter barrels are more rigid and, thus, more accurate. The primary pratical difference you'll see in barrel length will be velocity. I would use a 16" barrel but that's just my personal preference. (18" is about optimal length.)
Easy to forget that the AR-15 is a SCHV (Small Caliber High Velocity) weapon. Start taking out the 'V' and soon you just have a .22 left.