Magnaport Recoil Reduction
 
Read the article "MAGNAPORT Recoil Reduction", by Nick Harvey, from the Australian shooting magazine "Guns Australia", May/June 1992 for an independent review of the Magnaport system for rifles.
What exactly is Mag-na-port?
Most shooters, when asked to define what recoil is, would probably describe the physical and psychological beating received when firing a firearm. The shooter may not be aware of the problem of flinching as a result of uncontrolled recoil and the effect that this will have on the target. Some shooters are simply not able to overcome flinching easily.
Recoil is the reaction that takes place as the projectile leaves the barrel and releases gas, resulting in a tremendous amount of energy. The higher the velocity, the greater the reaction. Recoil will cause the muzzle to “jump” or rise and the gun to pivot in the shooters hands.
The Mag-na-port process was developed in the USA by Mr. Larry Kelly who used simple physics combined with his 30 years experience in E.D.M (Electrical Discharge Machining) technology and lifetime knowledge of firearms to develop a method of reducing recoil and muzzle jump. Using trapezoid shaped ports to aim exhaust up from the top of a gun’s barrel, the muzzle pressure is reduced.
The E.D.M. process used by Mag-na-port can be described as a spark erosion process. An electrical spark wears away the metal using an interrupted flow of electrical power. When finished, a clean burr-free port is cut into the barrel, leaving the surrounding finish undisturbed. The trapezoid design works as a metered port regulating gases as they escape, ensuring the velocity effects by Mag-na-porting are insignificant. The trapezoid ports are so unique in shape and function, they were the first porting system protected by U.S. Patent and are currently protected as a registered trademark of Mag-na-port International Inc.
In 1989 Graham Bugden purchased the only Australian Mag-na-port agency for M.A.B. Engineering.
Mag-na-port has been tested many times since its initial introduction. H.P. White Laboratories performed tests on rifles equipped with and without Mag-na-port to determine the effect on free recoil and velocity. Findings in the laboratory-conducted test had a 20.8% reduction in free recoil for the rifle equipped with Mag-na-port. These same tests noted velocity averages less than four-tenths of 1 percent with the Mag-na-ported rifle, considered statistically insignificant.
In tests at Cornell University using a series of compression sensors rigged to a modified Ransom Rest mounted on a spring-loaded sliding track connected to an oscilloscope, a before and after analysis of the effect of Mag-na-porting on a series of different calibre revolvers was conducted. These tests were on revolvers ranging from .38 Special to .44 Magnum, in barrel lengths from 2 to 8-3/8 inches and frame sizes from small to heavy. Recoil reduction ran from a low of 11% on the .38 to a high of 47% on the .44 magnum. The conclusions drawn from the tests confirmed that Mag-na-port does not decrease bullet velocity or increase muzzle blast. These same tests also confirmed that Mag-na-port does reduce the intensity of apparent recoil.
The velocity impact from porting is affected by port placement with regard to muzzle and chamber. The trapezoid ports placed near the end of the barrel allow maximum bore travel for the bullet to receive full pressure prior to reaching the ports and exiting the barrel. Mag-na-port in and of itself has no effect on the accuracy and does not alter the internal bore configuration or in any way distorts the bore.
Mag-na-porting is done at the M.A.B. Engineering factory in Brisbane, usually with a maximum 10 day turn-around time.
Magnaport Recoil Reduction for Rifles"MAGNAPORT Recoil Reduction", by Nick Harvey, from the Australian shooting magazine "Guns Australia", May/June 1992 for an independent review of the Magnaport system for rifles.
Read the article
The rifle style Mag-na-porting consists of two trapezoid ports and two oval ports cut into the sides of the barrel. This style of porting is available on barrels of 7 ½ inches or longer and is recommended for larger calibres. Two trapezoid ports at approximately 50 degrees, are located approximately ½ inch from the muzzle face from each side of the top centre line of the barrel, and two oval ports at 90 degrees are located approximately 1 ½ inches from the muzzle. The side ports help by providing additional reduction in recoil and aid in barrel stability.
The Mag-na-port process is not an add-on adaptor and does not add additional length to the barrel. Aesthetically, the small vents are barely noticeable and the E.D.M. process does not affect the surrounding finish. The primary advantage of Mag-na-port on a rifle is the reduction in muzzle jump.
Note: Porting on rifles with banded front sights is done behind the sight band. Barrels less than .110 in wall thickness are too thin for porting services.
Magnaport Recoil Reduction for PistolsSemi-Auto HandgunsMagnaport Recoil Reduction for PistolsSemi-Auto Handguns
Handgun recoil, more specifically felt recoil, is perceived differently by individual shooters. The less experienced shooters will be more aware of the lessening of felt recoil in a gun that has been Mag-na-ported. The degree of change in a handgun’s shooting characteristics, subsequent to Mag-na-porting, depends on many factors: barrel length, weight and load.
Traditional Mag-na-porting of a handgun consists of two trapezoid ports cut into the barrel approximately ½ inch from the muzzle. These ports are placed at approximately 35 to 45 degree angles. For the shooter, this translates into a reduction of perceived recoil of 15 to 20%.
Mag-na-port offers a unique system of porting semi-automatics handguns by using a trapezoid port through the barrel and an oversized expansion vent through the slide to allow maximum dissipation without fouling. This process offers an alternative to shooters not wanting additional weight or length from add-on compensators.
Shooters using this method do not experience the large flash of muzzle blast encountered with systems dumping larger volumes of gases through holes positioned across the centreline.
Mag-na-porting makes a handgun much more manageable and much more pleasant to shoot. On lighter calibres, shooters find their primary benefit is reduction in muzzle jump.
Handgun recoil, more specifically felt recoil, is perceived differently by individual shooters. The less experienced shooters will be more aware of the lessening of felt recoil in a gun that has been Mag-na-ported. The degree of change in a handgun’s shooting characteristics, subsequent to Mag-na-porting, depends on many factors: barrel length, weight and load.
Traditional Mag-na-porting of a handgun consists of two trapezoid ports cut into the barrel approximately ½ inch from the muzzle. These ports are placed at approximately 35 to 45 degree angles. For the shooter, this translates into a reduction of perceived recoil of 15 to 20%.
Mag-na-port offers a unique system of porting semi-automatics handguns by using a trapezoid port through the barrel and an oversized expansion vent through the slide to allow maximum dissipation without fouling. This process offers an alternative to shooters not wanting additional weight or length from add-on compensators.
Shooters using this method do not experience the large flash of muzzle blast encountered with systems dumping larger volumes of gases through holes positioned across the centreline.
Mag-na-porting makes a handgun much more manageable and much more pleasant to shoot. On lighter calibres, shooters find their primary benefit is reduction in muzzle jump.
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