Glock 17 with lands and grooves?

[Cheapshooter]

Just bought a used G17 Gen3. I thought all Glocks had the polygonal, or hexagonal rifling. This one has Trijacon night sights, and obvious lands and grooves rifling. The barrel is marked with the Glock logo, and a serial number matching the frame.
Did they make some with land and groove rifling?

 

[DPris]

Depends on what you're calling lands & grooves.
Glock factory rifling has, essentially, lands & grooves in appearance, just well-rounded "lands".
Denis

 

[Uncle Malice]

All factory barrels are polygonal rifling. Is the barrel hood actually stamped with the Glock logo and serial number?

 

[T. O'Heir]

And all of 'em have lands and grooves. It's how those got there that's not the same.

 

[JohnKSa]

All Glocks have polygonal rifling. Either hexagonal or octagonal depending on the caliber.

Looking at the inside of the bore can be a little confusing because the appearance will be of a fairly typical rifled bore that has very rounded lands. If one looks just at the muzzle where the rifling meets the crown, or at a fired bullet gives a more accurate picture of the actual rifling profile.

The picture below is of the muzzle of a Glock 17 barrel.

The picture below is of the base of a bullet fired from the barrel in the picture.

 

[DPris]

You still catching those display bullets in your teeth, John?
Denis

 

[JohnKSa]

My dentist made me quit that.

I pulled the one in the picture out of the sand berm at my local gun range after a shooting session.

 

[DPris]

I like my version better....
Denis