Why does the barrel tilt upwards on some guns?


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Gunsmoker
January 11, 2007, 01:00 AM
I've noticed when some guns have the slide locked back, the barrel looks like it's tilting upwards.

Why?

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rockstar.esq
January 11, 2007, 01:17 AM
The reason that the barrel is tilted upwards when the slide is locked back is due to the gun in question utilizing a variant of the John M Browning tilting breech system.

The chamber area of the barrel is designed to either lock it's lugs into recesses in the slide (in 1911 style systems) or it is profiled such that it locks itself in the ejection port when the barrel is locked in (like Sig, Glock, etc.)

In all cases the barrel travels with the slide a short distance upon firing which serves to allow chamber pressures to drop for safety. Once the barrel has traveled 1/10" or so it typically tilts down at the chamber end whilst the slide continues it's rearward travel ejecting the spent casing as it goes.

If you get a chance you might look at S&W's website I believe they have a dissected view diagram of their autopistols which might help to illuminate matters further.

HGUNHNTR
January 11, 2007, 03:14 AM
In addition, look at the angle the loaded rounds feed out of your mag, and the angle the bbl is tilted. Yep, they are the same, there is no need for the round to make a turn to slide into the barrel of your firearm, thus dramatically increasing reliability, especially for HP ammo.

unspellable
January 11, 2007, 01:16 PM
Every thing has a down side. In the case of the tilting barrel the barrel is a seperate piece from the slide with the sights. It requires very careful fitting to obtain the sort of target grade accuracy that is inherent in actions that have a rigid barrel. Full sized 22 pistols with a rigid barrel and blow back action tend to have good accuracy out of the box. A Luger is recoil operated but the barrel is rigidly attached to the slide and the out of the box accuarcy will be comparable to a fully accurized Browning type tilt barrel action.

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