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Old November 22, 2014, 11:07 AM   #1
Cheapshooter
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Glock 17 with lands and grooves?

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?
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Old November 22, 2014, 11:16 AM   #2
DPris
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Depends on what you're calling lands & grooves.
Glock factory rifling has, essentially, lands & grooves in appearance, just well-rounded "lands".
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Old November 22, 2014, 01:00 PM   #3
Uncle Malice
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All factory barrels are polygonal rifling. Is the barrel hood actually stamped with the Glock logo and serial number?
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Old November 22, 2014, 02:12 PM   #4
T. O'Heir
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And all of 'em have lands and grooves. It's how those got there that's not the same.
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Old November 22, 2014, 02:33 PM   #5
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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.
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Old November 22, 2014, 02:52 PM   #6
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You still catching those display bullets in your teeth, John?
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Old November 22, 2014, 03:25 PM   #7
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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.
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Old November 22, 2014, 10:47 PM   #8
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I like my version better....
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