Our premium-quality aluminum alloy barrels are fully machined to precise, match grade tolerances from exceptionally hard 7075 aluminum. The 7075 aluminum is much stronger than many mild steel alloys and gives all the benefits of a thick barrel and improves the heat distribution for better accuracy. These barrels are light weight ranging from 13-18 ounces - less than half of the weight of traditional steel barrels weighing up to 60 ounces. A custom Beyer Match Chamber is inserted in all barrels. Barrel shanks are oversized to .001" and may require a little sanding to fit receiver; .17 HM2 barrel requires a heavy bolt or bolt handle assembly. .750" diameter barrel accepts standard AR-15/M16 gas blocks for extra mounting options. Recessed target crown protects the rifling at the muzzle. Overall our barrels allow for greater versitility for long hikes, full day at the range, increased endurance for youth shooting and ease of use.