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Posted: 3/12/2014 6:01:34 AM EDT
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have a few questions im in the market for an m1a loaded.... i already have 7.62 phantom qd....
obvioulsy i will end up putting the phantom on the m1a its just bound to happen. i have been reading several old threads on here and a few other forums that the threads on the barrel theading on the m1a is lack luster and or specifically that some people have had issues with the mount coming off while firing. any truth to this? when i look at the yhm front site qd base has a clam on the back is it functional should i be conserned? if the threads are bad how does the delta-p with a castle nut do anthing diffrent it is still the same threading on the barrel the threads i was reading were older from 08 ish |
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When I did it I was having trouble with the threads being that weird M18 thread pitch. I looked at the adapters to change it to 5/8x24 (gemtech, delta p, etc) and ended up finding an AAC mount in that thread pitch. Since I put it on I haven't had any problems with the mount backing off or anything like that. Just know there is a considerable amount of blow back as well as gas in the face. I didn't think it was too bad but my brother hated it.  (A little motivation)
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Quoted:
thanks for the advise so i should have no fears about using the factory threads on an m1a barrel. does that gas defector hindor brass ejection at all? I am in (or will be this year) the same boat OP. Going to make a Vietnam M1A suppressed clone, with a PVS-2 starlight scope. I also have had some concerns from those old reports. |
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Quoted: thanks for the advise so i should have no fears about using the factory threads on an m1a barrel. does that gas defector hindor brass ejection at all? The M3 is a brass deflector used with the M21 blank adaptor and there have been some issues with ejection at times. |
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Quoted:
does that gas defector hindor brass ejection at all? No. Thousands of rounds fired from a couple different M14s over the past 8 years with the M3 shield installed. ZERO problems experienced. I've also never heard of anyone else having any problem with the M3 in this application. |
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Dude, I want chamber flags just like that. Where can I get a few dozen of those? Quoted: When I did it I was having trouble with the threads being that weird M18 thread pitch. I looked at the adapters to change it to 5/8x24 (gemtech, delta p, etc) and ended up finding an AAC mount in that thread pitch. Since I put it on I haven't had any problems with the mount backing off or anything like that. Just know there is a considerable amount of blow back as well as gas in the face. I didn't think it was too bad but my brother hated it. (A little motivation) |
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I got the chamber flag from Accurate Ordnance (http://accurateordnance.com/) They also did the cerakote work on it. I didn't mod the spindle but did use a Schuster adjustable gas plug.
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Quoted:
did any one mod there spindle for use with suppressor that seems like the way to go? what diamiter hole did you drill and in what location? i heard awc does it when you buy their can but since i already have the yhm ill need to do it my self? I use SEI's Wind Talker suppressor and the only modification required was the installation of the correct DC Vortex. The adjustable gas plug is not needed with the SEI can either. |
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Quoted:
I use SEI's Wind Talker suppressor and the only modification required was the installation of the correct DC Vortex. The adjustable gas plug is not needed with the SEI can either. Quoted:
Quoted:
did any one mod there spindle for use with suppressor that seems like the way to go? what diamiter hole did you drill and in what location? i heard awc does it when you buy their can but since i already have the yhm ill need to do it my self? I use SEI's Wind Talker suppressor and the only modification required was the installation of the correct DC Vortex. The adjustable gas plug is not needed with the SEI can either. H2O MAN - you seem to be pretty well informed/knowledgeable about the suppression of the M1A platform - is there a noticeable difference in suppressing a M1A 22" vs the Scout Squad? Sorry not trying to mess with your thread OP! |
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is there a noticeable difference in suppressing a M1A 22" vs the Scout Squad? Not that I have noticed. I suppressed the 18" first (2006), and my 22" wasn't suppressed until a couple years later. You should know that shorter barrels are better for subsonic ammunition, no matter what rifle type. |
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Not that I have noticed. I suppressed the 18" first (2006), and my 22" wasn't suppressed until a couple years later. You should know that shorter barrels are better for subsonic ammunition, no matter what rifle type. Quoted:
Quoted:
is there a noticeable difference in suppressing a M1A 22" vs the Scout Squad? Not that I have noticed. I suppressed the 18" first (2006), and my 22" wasn't suppressed until a couple years later. You should know that shorter barrels are better for subsonic ammunition, no matter what rifle type. Thanks H2O! |
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Quoted:
When I did it I was having trouble with the threads being that weird M18 thread pitch. I looked at the adapters to change it to 5/8x24 (gemtech, delta p, etc) and ended up finding an AAC mount in that thread pitch. Since I put it on I haven't had any problems with the mount backing off or anything like that. Just know there is a considerable amount of blow back as well as gas in the face. I didn't think it was too bad but my brother hated it. <a href="http://s181.photobucket.com/user/KavonT/media/20130125_103100.jpg.html" target="_blank">http://i181.photobucket.com/albums/x109/KavonT/20130125_103100.jpg</a> (A little motivation) I have a very similar setup and agree with KavonTN. |
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Quoted:
The M3 is a brass deflector used with the M21 blank adaptor Quoted:
Quoted:
thanks for the advise so i should have no fears about using the factory threads on an m1a barrel. does that gas defector hindor brass ejection at all? The M3 is a brass deflector used with the M21 blank adaptor Those are the M3 breech shield and M12 blank firing attachment for us nomenclature Nazis. 
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