RockYourGlock offers a unique system of porting semi-automatics by using a oval port through the barrel and an oversized expansion vent through the slide to allow maximum dissipation without fouling. Shooters using RockYourGlock's "C-Comp" services do not experience the large flash of muzzle blast experienced with systems dumping larger volumes of gases through holes positioned across the center line. Law enforcement agencies and companies offering night sights have tested our porting service finding no increase in muzzle blast or night blindness attributed to our porting service. It's amazing what a difference two oval slots can make! The wrist-wrenching recoil of a 10mm is controlled through the C-Comp porting making it feel more like an un-ported .45 ACP. The reduction in muzzle rise and felt recoil allows the .45 to be brought back on target in less time, which could be crucial in a firefight. Porting will make the gun more manageable and much more pleasant to shoot. On lighter calibers such as the 9mm, shooters find their primary benefit gained by a major reduction in muzzle rise. Turn around is 3-4 weeks for the C-Comp Porting.