Review: Mag-na-port Porting

There is a gun customization and smithing outfit in Harrison Twp, MI, called Mag-na-port Intl. Mag-na-port is famous for inventing an EDM process to cut trapezoidal ports into gun barrels. The idea is that by venting the gasses upwards, you reduce muzzle jump and felt recoil.

I have always wanted to get some of my guns ported, so I finally took the plunge and dropped off my Beretta M9 9mm, and my Remington 870 12ga shotgun at Mag-na-port.

A week later, they were finished. The cost was about $250 for both guns, and Mag-na-port gave me a 15% coupon to use for my next service.

The ports were cut cleaning through both barrels, leaving crisp edges and no burrs or other leftovers that I could see.

Shooting the 870

Not the v-shaped gas streams venting upwards from the ports.

Today I took the guns to an indoor shooting range that I like (Target Sports on Woodward) to test drive the ports.

The Beretta M9 was never a very hard recoiling gun to begin with, but I do think the porting helped reduce muzzle rise. It was quite pleasant to shoot. I did notice the bright orange gas streams venting upwards to either side of the barrel, but they were gone so quickly that they were not obtrusive. I need to go back and shoot some +P ammo, as I only had Winchester white box for this trip.

The 870 was still a 12 ga shoulder bruiser, but I also felt that the muzzle rise was reduced. Additional flash from the vents was not very apparent to me.

For both guns, I could not tell that they were any louder.

Shooting the 870: