Is there a big accuracy difference?  I wouldn't think so.  I know the 16" is lighter and the 20" shoots a faster bullet.  Other than that what are the differences?  I will be buying a bushmaster soon and am trying to decide on which one.

The 16" could be the "best overall" AR-15 length.There is actually little difference in velocity between a 20" and a 16" barrel.
Yes the 20" is longer,but you can still use it for home-defense.It's still a light rifle,and is still compact when compared to some other home-defense weapons.My personal AR-15 has a 16" inch heavy-barrel.It's very accurate,I love it.Nothing wrong with the 20" though.Not a big accuracy difference.Good barrels=good accuracy.
Look at it this way....you can't go wrong with either one!!! with the AR-15,you can have BOTH BARREL LENGTHS!!!! arn't we lucky???

*hugs AR-15*

There's actually a good amount of difference between 16" and 20". 127fps and 98 foot pounds be exact. Only 68 fps between 14.5" and 16".

[img]http://wsphotofews.excite.com/028/vU/3y/Rh/9m92813.jpg[/img]

I have both a shorty & a 20", both H-Bars. I find it easier to hit at distance w/ the 20", but I think that it is mostly because of the increased sight radius. (Neither rifle has optics) If I really take my time and concentrate off the bench, the shorty shoots just as small a group though. Go with what feels best to you.

16 inch.Lighter,quicker to the point and very accurate within 400 meters.Past 400 out to 600 aint bad either with a decent scope.Anything beyond 600 is a job for your 308.

accuracy should'nt make that big of differents at short ranges. Which ever one you purchase, just buy the other upper later, It's not a big deal.

Bigger is better!

[(:|)]