1. Carbon Fiber
For the past 30 years NASA has been using carbon-fiber composite materials for its spacecrafts to reduce weight. Now this material is being used for rifles, sniper scopes and other firearms. This high strength yet light weight material is ideal for long range shooting.
2. Back Draft Chamber
A back draft chamber, also known as an afterburner, is a device that forces combustion gasses through your barrel at extremely high speeds. Modern barrels are designed to help stabilize a projectile and prevent muzzle climb, but they do little to alter the speed of projectiles and their trajectory. A back draft chamber can increase the velocity of an arrow by 150% and can be attached to any rifle without interfering with normal operation.