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AR build - 16 or 20 inch barrel?

8243 Views 13 Replies 8 Participants Last post by  osucowboy8
Well, I've decided to build an AR. I'm pretty well set on how I want it to come together. I do have some questions about barrel length though. The rifle should be relatively light and easy to handle. I'd like to make head shots on the occasional deer inside of 250 yrds but it will mostly be used as a general purpose rifle. Long range beaver kills, home defense, plinking, and zombie apocalypse type situations. The military claims combat accuracy out to about 500 yrds with the carbine. Will the 16 inch barrel really provide me with the accuracy that I'm looking for or should I step up to a 20 inch barrel?
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nonnieselman said:
We have taken deer out to 350yds with a M4 barrel and 55gr FMJ 5.56 rounds.

IF your gun can hold 1moa or better you "should" be able to take deer head shots out to 300yds in theory.. We shoot for the heart/lungs or high neck and with a well placed shot they were DRT's.
What Nonnie said. ^^^^

Didn't I read somewhere that the 6.8 was designed for a 16" barrel, that you gain nothing going to a 20"?
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