Are you looking to get even more from your AR platform? People who understand ballistics know that longer barrels mean more velocity. The Ballistic Advantage 20" 5.56 designated marksman rifle (DMR) barrel delivers 100 to 200 feet per second more than a 16" barrel with the same round. More velocity means longer shots and stronger performance. The Ballistic Advantage 5.56 Performance Series 20-inch DMR barrel sets a new standard.
With this DMR barrel, you get much of the increased performance and accuracy found in bull barrels without the weight. These 5.56 Performance Series rifle-length barrels outperform standard 16" barrels in every category. The 4150 chrome-moly-vanadium steel blank is machined to precise tolerances and then given a quench-polish-quench (QPQ) case hardening that also delivers a naturally black finish. The barrel is threaded 1/2 x 28 for your favorite accessories and uses a .750" gas block. This barrel features a FailZero nickel-boron-coated extended M4 feed ramp extension for improved cycling. The Performance Series 20" 5.56 barrel also shoots .223 Remington.
had to do it twice 
