SMG has in their latest shooters catalog 14.5/16" 5.56 and 7.62x39 barrels.
yea ESS is cheapo --nearly disposable --LOL
$89 member price or $99 for non members.
if ya want to shoot 7.62x39 for little $$ this is the ticket.
IF ya can stand dealing with SMG and all their BS.
free shipping for $99 & above till the 16th with this code SH408
ps they got 1/2-28 threads so be aware that 5.56 FH will fit. the standard 5.56 type FH/brakes may or may not work on a 7.62. most 7.62x39s have 5/8-24 threads.
16 Inch M4 Barrel, Shooting Accessories, Ess at Sportsman's Guide