Re: AR 15 barrel length question?
I'm in agreeance with Gunhugger. that small difference will not necessarily equal greater accuracy all things being equal. Matching bullet length to barrel twist is extremely important for accuracy and stability, overal max performance.
.22 LR for example, after about 17", any extra barrel length is completely unnecessary; hence the 'bloop tube' on small bore target rifles. A standard velocity round gains nothing past that 17" (approx) mark but you do benefit from a longer sight radius.
16" is a fair length for very good accuracy IMO
"Loud noises don't end gunfights.... well placed shots do."