Its lack of maintence is why the gas adjusting screw is stuck in the first place.
I'm going to post this for everyone to learn and i'm sure most of us know this already so its for the newbie or guys who want a semi-auto. The way they operate can get confusing on how to adjust them properly.
The Egyptain Hakim, Egyptian Rasheed and SVT-40 Russian Tokarev gas systems are alike with the way they operate. These gas systems have adjusting valves that adjust how much gas goes thru the system to operate it and make it function with the excess gas going down the barrel it only allows the gas metered thru the gas port to operate the semi-auto cycling. So the "Less its open the better". My hakim's operates between 1 and 2 clicks open on the gas port adjusting valve. My SVT-40's seem to be ok with the setting on 1.3 it seems to be the norm with the ammo i'm shooting. If its a little sluggish when it cycles to achieve reliability and dependability you may have to open it up one more click or to the next higher number to allow more gas to operate the system.
Warning; If your SVT-40 seems to have too much recoil your gas valve needs to be readjusted correctly. On the SVT the scribed lines must be lined up perfectly so the little holes in gas ports are lined up perfectly or the svt won't function in semi auto. If the svt setting is too far open its like getting wacked in the shoulder with a baseball bat when you fire it with the recoil thats a clue that something is wrong. Don't shoot it because the bolt carrier is slamming the rear of the receiver inside thats not good its hammering itself.
All you have to do is to adjust the gas valve to correct it.
Now on the FN49 its a totally different gas system. The gas port is adjusted by a sleeve that opens up the port or closes the port.
NOTE; The FN49 gas port is an exhaust port so "the more its open the less gas the system sees to operate it". You adjust it the sameway you adjust the hakim but its all the way open and you shoot one round at a time till the bolt carrier locks open last round fired empty mag. You close the exhaust port a little at a tile till the bolt carrier locks back in the last round fired empty mag position. You shoot one round at a time till its adjusted properly them try 2 or 3 rounds to see how it cycles. You may need to close it a tad to achieve reliability and dependability if its a little sluggish when it cycles so more gas is saved to operate the system.
Please make sure you know which gas system your semi auto has and you understand how it operates before you try to adjust it. These military surplus semi-auto's will give us many years of shooting pleasure if we keep them maintained and adjusted properly in good working order. Don't get the open and closed mixed up this is where accidents can happen when there adjusted wrong. Please besafe do it right.
A few years ago when everyone was screaming its an out of battery firing i figured out its not having the gas systen adjusted correctly thats causing the hot gases from the breech. The bolt carrier is moving too soon by having too much gas pressure. The semi-auto needs a dwell time between the fire and extraction so the case contracts little after it expands when its fired. This causes the ripped case rims too because the case is being yanked out too soon while its still expanded. Once you figure your gas setting is set right you can double check it by inspecting the rim of the case for extractor marks. If the case rim is clean your setting is ok after you reset the gas valve. If it has extractor marks your gas valve is set wrong it still has too much gas in the system.
Sorry if i bored anyone........
