300%20Blackout%204.75%22%20AR15%20Barrel-%20Nitride%0A%26bull%3B%26nbsp%3BChamber-%20300%20Blackout%26nbsp%3B%0A%26bull%3B%20Length-%204.75%0A%26bull%3B%20Gas%20system-%20Micro%20Length%0A%26bull%3B%20Gas%20Block%20Size-%20.750%0A%26bull%3B%20Threads-%205%2F8-24%0A%26bull%3B%20Finish-%20Melonite%26nbsp%3B%0A%26bull%3B%20Twist-%201%3A7%205R%0A%26bull%3B%20Material-%2041V50%20Chrome%20Moly%20Vanadium%0A%26bull%3B%20Extension-%20M4%20Ramps%26nbsp%3B%0A%26bull%3B%20Barrel%20dimpled%20for%20gas%20block%20set%20screw%0A%26bull%3B%20Marked%20for%20Caliber%20and%20Twist%0A%26bull%3B%20Weight-%2010.56%20OZ%0A%26bull%3B%20Fully%20Made%20In%20House%20From%20KAK%20Industry%20Produced%20Blanks%0AAs%20a%20high%20volume%20contract%20manufacturer%20for%20the%20firearms%20industry%2C%20KAK%20is%20able%20to%20leverage%20its%20machining%20capacity%20to%20bring%20the%20same%20quality%20parts%20that%20we%20provide%20to%20some%20of%20the%20biggest%20names%20in%20the%20industry%2C%20straight%20to%20the%20retail%20customer.%26nbsp%3B%20We%20manufacture%20our%20barrels%20from%20the%20raw%20material%20all%20the%20way%20to%20the%20complete%20product%2C%20all%20under%20our%20own%20roof.%26nbsp%3B%20Our%20barrels%20are%20fully%20inspected%20through%20the%20entire%20process%2C%20including%20air-gauging%20the%20bores%2C%20physical%20measurements%20of%20the%20threads%20and%20outer%20diameters%2C%20and%20100%25%20gauging%20of%20the%20headspace%20tolerance.%26nbsp%3B%20Our%20OE-Spec%20line%20provides%20you%20with%20the%20quality%20you%20demand%20and%20the%20value%20you%20desire.%0A%0A***MICRO%20GAS%20BARRELS%20MAY%20REQUIRE%20SLIGHT%20MODIFICATION%20OF%20BARREL%20NUTS%20FOR%20CERTAIN%20RAIL%20SYSTEMS.