Does Glock still use polygonal rifling?

45 GAP Glock models will have eight barrel grooves instead of six, but will still be using the polygonal rifling design.

Is a Glock barrel polygonal?

Polygonal rifling is common in pistol barrels, and is used by Glock (Gen 1-4), Walther, Heckler & Koch, and several other companies.

Is polygonal rifling better?

Providing a better gas seal around the projectile as polygonal bores tend to have shallower, smoother edges with a slightly smaller bore area, which translates into more efficient seal of the combustion gases trapped behind the bullet, slightly greater (consistency in) muzzle velocities and slightly increased accuracy.

What guns use polygonal rifling?

But a number of firearms manufacturers use polygonal rifling, most notably Glock, H & K, and Kahr. For years people have wondered about the effects of the different styles of rifling, and whether one or the other would offer specific advantages for accuracy or velocity from a given cartridge.

Can a Glock Gen 5 shoot lead bullets?

The barrel is considerably different than earlier versions for several reasons, but one rises above the rest: The barrel in the Gen 5 is cut with conventional rifling. The previous polygonal rifling has advantages, but it isn’t well-suited to launching lead bullets.

What is the purpose of polygonal rifling?

Polygonal rifling prohibits the examiner from measuring the width of land and groove impressions because the lands and grooves have a rounded profile instead of a well-defined rectangular profile. Polygonal rifling is most frequently observed in firearms marketed by Glock and Heckler & Koch.

Why is Glock polygonal rifling?

In reality, polygonal rifling is popular among law enforcement pistols and has been since before Glock was the mainstay. Polygonal rifling has shallower channels. Instead of using deep, square cuts, there are shallow cuts in the channel. This means that less gas can escape from the bullet without leaving the barrel.

What is the best rifling twist?

What is the best barrel twist rate? The best barrel twist rate depends on what type of bullet you are shooting. A fast twist rate such as a 1:7” twist barrel will work better with long-range modern bullets where as a shorter twist such as 1:10” or 1:11” twist barrel will work better with shorter bullets.

What is Glock polygonal rifling?

Can you shoot lead bullets in a Glock marksman barrel?

Just so you understand or may be concerned, the folks at Glock do not recommend the use of lead, non-jacketed bullets in any of their products. To add to that, Glock, and most of the other major manufacturers, discourage the use of reloaded ammunition in their products.

What is a Glock marksman barrel?

The Glock company’s newest generation of pistols (G42/43, Gen5) is equipped with so-called “Glock Marksman Barrels” (GMB). These barrels feature an enhanced polygonal profile with right-hand twist and a small rifled profile on either side of the main polygonal field impression (Hernandez et al., 2016).

Which rifling is the best?

Button rifling is well suited to mass-production methods with high output. Button rifling leaves a smooth, bright finish inside the barrel that need not be lapped. Button-rifled barrels are very accurate. Bore and groove dimensions are very consistent.

Is the Glock polygonal rifling really a’polygonal’?

Glock features Polygonal barrel rifling on all of its handguns. But, is it truly a ‘polygonal’ rifling as the Austrian manufacturer and most hardcore fans claims? We should never take gun technology for granted, even when the matter may appear trivial. Andrea Allemandi. Photos: Franco Palamaro 18.09.2014

What is the rifling profile of a Glock pistol barrel?

The rifling profile should always be considered as being composed by rectilinear segments (the lands) intertwined by circular arches (the grooves); in my opinion, following this description, the Glock pistol barrel configuration should be described as “semi-polygonal rifled”.

What type of rifling does the CZ and Glock use?

H&K, CZ and Glock use a female type of polygonal rifling similar to the bore shown above right. This type has a smaller bore area than the male type of polygonal rifling designed and used by Lothar Walther.

What are the advantages of polygonal rifling?

Polygonal or wavy rifling has more shallow channels. This allows the least amount of gas to escape around the bullet leaving the barrel. It also creates a greater bearing surface which will increase velocity and accuracy. If this is hard to grasp, think of the tread that’s on a tire again.