The APP HITTMANN Pro-barrel for A5 in Spiral. The 14" HITTMANN barrel is made out of 6061 Grade Aluminum that is sure to silence the competition. Precision placed porting eliminates back pressure while 6 flute straight rifling increases range. Burnished to .6875" for competition consistency. HITTMANNS ergo design and surprisingly low cost makes it a great barrel to have in your gear bag. Black Anodized only. Three porting patterns to choose from one price.