tattoo72
NES Member
I purchased a used Glock this weekend that was on consignment at First Defense Firearms. I'm trying to find some info on the ported barrel/slide assembly. Has anyone ever seen one like this before?
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Glock 21 ported barrel/slide?
- Thread starter tattoo72
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Strange that they would comp a .45? That's a pretty low pressure round. Comps work better the more gas you put through them. .38 super, 10mm 9x25 dillon, 9x21 to name a few really benefit from comps. I would not want to shoot that in a car or house in a self defense situation that's for sure. Pretty interesting set up I wonder how it runs side by side with an un comped .45
In God We Trust
NES Member
I don't know about that design in particular, but I have a regular unmodded G21 and have fired it side by side with a compensated one. I couldn't really feel any difference but the muzzle flash was worse on the comped model. My opinion is that instead of using compensators, just get a smaller gun if it barks too much.
Not really sure, but it looks like a variant of one of this company's barrels http://www.schuemann.com/default.aspx with extra meat in front of the first hole to be able to mount a front sight. I'd think they would have their name someplace on the barrel, but, if not, maybe a very talented machinist/gunsmith made it?
tattoo72
NES Member
I don't think it is an aftermarket barrel. The frame, barrel and slide serial numbers are all the same. I bought it to be a range gun. It will never be fired in a house or car. That is what my Ruger sr9c is for.
ChevyGuy91
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I have a related question about barrel porting, and maybe someone here can shed some light for me. I would think something like this reduce the muzzle velocity, right? I understand it reduces felt recoil, but does it hurt the terminal velocity? It seems to negate any benefit a longer barrel would give you.
I ask because I am interested in a 10mm long slide conversion for my G21 some time down the road, and am intrigued by a ported barrel.
I ask because I am interested in a 10mm long slide conversion for my G21 some time down the road, and am intrigued by a ported barrel.
What you have is a "Hybrid" barrel popularized by Wil Scheumann. He was the first to offer this type of barrel, but I'm not sure this is his work. You are right that this type of barrel does reduce muzzle velocity because the ports bleed off gas while the bullet is still in the barrel. The only way to determine how much velocity is lost is to chrono the ammo.
Due to the fact that the .45 is a rather low pressure round this porting may not be all that effective. The 45 does respond, however, to a well designed comp. The first comps used in practical shooting were installed on 45s and they revolutionized the sport. The more effective, higher pressure 38 Super came later.
Due to the fact that the .45 is a rather low pressure round this porting may not be all that effective. The 45 does respond, however, to a well designed comp. The first comps used in practical shooting were installed on 45s and they revolutionized the sport. The more effective, higher pressure 38 Super came later.
In God We Trust
NES Member
It does reduce muzzle velocity to some degree. Thats why they seem pointless to me. Just get a smaller caliber gun.
On a defensive gun, I agree. On a competition gun, however, if comps are legal they're pretty much a requirement.
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If it helps you shoot faster in competition it's not that pointless, and depending on the sport, if you are meeting whatever the power floor is for the class you are in, that's all that's required.
In pin shooting power only matters up to a point. With my mutt gun I have the best of both worlds... a barrel that is over 5" long, a 3 vent comp, and muzzle velocities greater than a typical 5" 1911.
I'd never carry a comped/ported gun for SD... too much flash.. but in the daytime knocking things down or shooting targets... good stuff, if your sport allows it.
-Mike
tattoo72
NES Member
I just found this on the Lone Wolf Distributors website. I don't know how true it is.
Internally ported barrels will blow carbon on to the front sight. In as few as 5 rounds the sight will become totally black. The carbon is easily removed with any firearms solvent. There will be a 5% to 8% reduction in bullet velocity when compared to stock barrels. Muzzle rise is reduced by 75% or more depending on ammunition.
Externally ported barrels will not black the front sight. There is no reduction in bullet velocity when compared to stock barrels. Muzzle rise is reduced by 50% or more depending on ammunition.
Internally ported barrels will blow carbon on to the front sight. In as few as 5 rounds the sight will become totally black. The carbon is easily removed with any firearms solvent. There will be a 5% to 8% reduction in bullet velocity when compared to stock barrels. Muzzle rise is reduced by 75% or more depending on ammunition.
Externally ported barrels will not black the front sight. There is no reduction in bullet velocity when compared to stock barrels. Muzzle rise is reduced by 50% or more depending on ammunition.
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