Lone Wolf distributors offers a drop-in ported barrel from Federal Arms for the G30/36. The ported barrel extends about one inch beyond the slide which I have found to be a negligible difference when carrying inside the waistband utilizing the Clip Draw device. Although Federal Arms states that their ported barrel is of match quality, I do not find its performance to be quite as good as the factory Glock barrel in terms of accuracy. Additionally I had quite a few failures to feed with the Federal Arms barrel; luckily these seem to have smoothed out now that I have over 200 rounds through it. The real advantage to the Federal Arms ported barrel is in recoil reduction. In shooting the factory stock barrel and the Federal Arms ported barrel side-by-side I would estimate that the Federal Arms barrel reduces felt recoil by about 35%.
Shots fired from the factory Glock barrel (even through the compensated barrel is shown in the picture):
12 rounds of of Remington UMC 230 grain FMJ at 21 feet.
6 rounds of Remington Golden Sabre 230 grain JHP at 21 feet
Shots fired from the Federal Arms Compensated Barrel:
12 rounds of Winchester 230 grain FMJ at 31 feet
12 rounds of Remington Golden Sabre 230 grain JHP at 21 feet.
12 rounds of Fiocchi 230 grain FMJ at 31 feet.