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Offline Curt Dawson

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semi auto question
« on: March 30, 2010, 05:21:40 PM »
A question was posed  to me and Iwas not sure of the answer so I thought I would post it here. If the gas system is disconected or otherwise made inoperable will the rifle revert to a sort of straight pull bolt action rifle? ???
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Offline Frank46

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Re: semi auto question
« Reply #1 on: March 30, 2010, 06:41:38 PM »
M1 carbines have been converted to pump action by removing the gas piston and plugging the hole where the gas piston was located. Depends what type of semi auto military rifle that you may be thinking about. Garands can have an adjustable valve installed to control the amount of gas that the operating rod gets and I believe that something similar is available for the sks type semi autos. Frank
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Offline cbxboy

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Re: semi auto question
« Reply #2 on: March 30, 2010, 07:13:46 PM »
Which rifle specifically?
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Offline S.S.

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Re: semi auto question
« Reply #3 on: April 01, 2010, 06:53:23 PM »
In most cases yes.
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Offline trotterlg

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Re: semi auto question
« Reply #4 on: April 01, 2010, 08:25:16 PM »
You are probably refering to the on off switch for use when using the gernade launcher cartridge.  Larry
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Offline 1911crazy

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Re: semi auto question
« Reply #5 on: April 04, 2010, 05:48:44 AM »
Quote from: Curt Dawson on March 30, 2010, 05:21:40 PM
A question was posed  to me and Iwas not sure of the answer so I thought I would post it here. If the gas system is disconected or otherwise made inoperable will the rifle revert to a sort of straight pull bolt action rifle? ???

If you take a yugo sks and move the gas port switch to gernade the rifle becomes a straight bolt pull.  You can shut the gas off on a egyptian hakim, egyptian rasheed and a russian svt-40 tokarev too.

I found an unissued russian tokarev svt 40 that was still unfired because the PO didn't have the scribed lines lined up on the gas port screw.  The gun never operated in semi auto.  The gas port holes are very small and won't line up if the scribed lines aren't exactly lined up. He thought the gun was broke.
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Offline pslshooter

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Re: semi auto question
« Reply #6 on: April 04, 2010, 04:44:34 PM »
I've managed to tune down my PSl to the point it doesn't cycle. Simple install of a set screw into the gas block with a smaller hole than the barrel gas hole. I have another set screw that allows the action to operate without slinging the brass I'm reloading 15' and nearly folded in half. It's a conversion that another guy came up with, but the no cycle works well for me. Keeps my shots at a low rate and keeps the thin barrel cool.
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Offline securitysix

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Re: semi auto question
« Reply #7 on: April 06, 2010, 01:36:31 AM »
The gas can be turned off on an FAL as well.  It can also just be improperly adjusted, causing the straight pull bolt effect instead of normal semi-automatic function, too.

When Universal ran out of GI parts and redesigned the guts of their commercial M1 Carbines, their gas system allowed for conversion from standard semi-automatic function to straight-pull bolt-action function by flipping the gas piston over.

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