Comments on: Working on the VG1-5 bolt

By: S.N.A.L

S.N.A.L — Thu, 12 Nov 2015 20:27:10 +0000

2 other gas delayed blowback systems:

_Kurt Horn Sturmgewehr:

http://www.weaponeer.net/_image_resize.asp?Height=428&Width=1164&Path=http://popgun.ru/files/g/36/orig/695905.jpg

http://i2.guns.ru/forums/icons/forum_pictures/000695/695899.jpg

http://fr.scribd.com/doc/76267633/sturmgewehr-grossfuss

http://i2.guns.ru/forums/icons/forum_pictures/000695/695899.jpg

http://forum.axishistory.com/viewtopic.php?t=122572

_ HK p7

https://upload.wikimedia.org/wikipedia/commons/2/26/P7_Gas-DelayBBack.PNG

http://www.firearmsworld.net/german/hk/p7/cutaway.jpg

By: Storm

Storm — Wed, 11 Nov 2015 16:42:59 +0000

Supposedly they function, but in not very big percent, seeing how close to the muzzle they are.
The blocked ports affair difference puzzles me too, I hope we will see the high fps camera testing of that, if its possible to calculate if the bolt moves/opens faster when they are blocked.

Being close to chamber would be much better option, but then it would be needed to redesign the whole gun, especially the gas chamber, to fit it somehow near chamber.
With that arrangement I suppose gas erosion of the ports would be much greater, so you would need to think a way around that, too.

By: S.N.A.L

S.N.A.L — Wed, 11 Nov 2015 13:03:45 +0000

there is pistols on this principle:

https://en.wikipedia.org/wiki/Heckler_%26_Koch_P7

http://usercontent2.hubimg.com/1826523_f520.jpg

https://upload.wikimedia.org/wikipedia/commons/a/ad/P7_Gas-DBBack.PNG

http://www.firearmsworld.net/german/hk/p7/cutaway.jpg

http://www.firearmsworld.net/german/hk/p7/

By: Rufus Chucklebutty

Rufus Chucklebutty — Sun, 08 Nov 2015 01:55:37 +0000

I was wondering at what exact point in the cycle the gas ports in the barrel function, and what the difference is if they are blocked ?

Maybe if the ports were at the chamber end a true gas delayed blowback could be achieved ? Could be an interesting experiment ?