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View Full Version : Suppressor on FAL


ramrod45
September 29, 2009, 20:36
Just got a YHM .308 suppressor with a "Quick Dawn" flash hider. Mounted it on my DSA SA58 (FN FAL) 16" barrel. Yankee Hill Machine products are outstanding in quality and had no problems installing the flash hider on the FAL. So off I go to the shooting range (indoor range, no public out door ranges here in Raleigh NC. Lots of f**king golf courses, but no public out door ranges) The first 40 rounds went fine, the gas pressure was fine, I had it all the way open. After that the chamber became very dirty. The gun would jam and miss fire. I'm not disapointed, I had a feeling with the increased back pressure from the suppressor there would be some added, build up of "junk" causeing problems.

easttex
September 29, 2009, 21:32
Is it possible to adjust the gas system to account for the extra back pressure?

And, how accurate was it?

Also, how loud was it after it was all said and done? 22lr loud? Or quieter?

Thanks!

akabaron
September 30, 2009, 09:10
I have one on a OSW and have no problems w/ the suppressor. In fact even with it all the way open it still launches the brass at light speed. Mine you dont have to use ear protection but I would still recommend it as after a few shots it gets to you. Not the loud blast but the high pitched crack gives your ears a funny feeling

ActionYobbo
October 01, 2009, 07:14
I have one on my short L1A1. I have 2 gas pistons one is modified for use with the silencer and the other is normal for use with out the silencer. takes a bit of tuning the piston so I can change them with out ajusting the gas regulator.
as for the junk in the chamber, what a hassle. there is only 2 things that can be done for full power ammo . the first is dont use dirty ammo. I load for mine using ADI powder to keep the dirt down. the other thing is using a garand chamber brush. I have one that has fourby wraped onto it. after the rifle starts to misbehave I give the chamber a clean with the brush and its good for another few mags
or you could load your ammo so it just cycles the gun with the gas shut
http://i292.photobucket.com/albums/mm9/ActionYobbo/L1A1-1.jpg

Rudolf
October 01, 2009, 12:36
I have on mines, lots of gas back to the face....and its loud on the action noise

ramrod45
October 01, 2009, 17:18
Action Yobbo

The gas pistol you use with the suppressor. How is it modified, and what positive effect does it have when useing it ? Thanks

ActionYobbo
October 01, 2009, 17:34
the end of the piston is not round like a standard piston it has flat spots ground on it. I read on here some where that some one slotted the piston head on theirs. it reduces the piston efficiency to compensate for the added back pressure caused by the silencer

stimpsonjcat
October 02, 2009, 10:12
Nice simple solution!

W.E.G.
October 02, 2009, 10:17
I have heard of dremeling the piston.

Its better if the rubber-nubbed head is used with lube. :angel:

easttex
October 02, 2009, 13:07
Originally posted by ActionYobbo
the end of the piston is not round like a standard piston it has flat spots ground on it. I read on here some where that some one slotted the piston head on theirs. it reduces the piston efficiency to compensate for the added back pressure caused by the silencer

I don't suppose you have any pictures of that do you?

Skilter
October 12, 2009, 16:43
Originally posted by W.E.G.
I have heard of dremeling the piston.

Its better if the rubber-nubbed head is used with lube. :angel:

<insert porn music here> :shades:

Tiecuando
October 13, 2009, 22:26
I've been thinking about a suppressor on a FAL too. I thought you would have had to remove the flash suppressor or something.

Artful
October 14, 2009, 01:19
My suppressor is 5/8x24 (standard US mil threading), So I had to remove my FAL flash suppressor and put an adapter from the 9/16 to 5/8 to be able to screw the can on.

You can purchase suppressors that mount to flashhiders (some standard and some Proprietary) the QD usually add the the price compared to thread on cans.

larphred
October 15, 2009, 09:25
Artful--can you tell me where you got your adaptor?
Thanks

easttex
October 15, 2009, 12:56
Originally posted by Artful
You can purchase suppressors that mount to flashhiders (some standard and some Proprietary) the QD usually add the the price compared to thread on cans.

I thought the BAFTE recently ruled that QD suppressors were now taboo?

larphred
October 16, 2009, 09:30
I recently purchased an advanced armament can with a Blackout flash hider with QD capability. Coincidently (and fortunately) my new Sig 556 SWAT came with a Blackout QD flash hider that is compatable with said can.

Stranger
October 16, 2009, 17:33
Originally posted by easttex


I thought the BAFTE recently ruled that QD suppressors were now taboo?

Not exactly. According to Yankee Hill Machine (YHM) the BATFE is saying that the QD adapters are considered to be "parts" of the suppressor, and as such they can't sell them without a tax stamp (constructive possession and all that rot). So, Yankee Hill Machine is currently not selling people extra QD adapters. However, they are the ONLY company not selling extra QD adapters. I bought four bilock adapters from Gemtech last month and they didn't bat an eye.

Artful
October 16, 2009, 23:29
Originally posted by larphred
Artful--can you tell me where you got your adaptor?
Thanks

I'm not sure which one I ordered that one thru

http://www.trosusa.com

http://www.tacticalinc.com

Or there were some machinist's there put adds on various gun/suppressor boards like sniperhide, hkpro, silencertalk etc.

I you know someone that runs a lathe well and can follow directions it's not hard - it's just an internal thread on round stock then an external thread coaxially done. Biggest pain is if your mixing metric and inch on the same piece.

Artful
October 16, 2009, 23:33
Originally posted by easttex


I thought the BAFTE recently ruled that QD suppressors were now taboo?

Not taboo as you have to ship one with the can or it doesn't go on a gun - the issue they had was YHM's design for their LID/Nielson and the replacement sleeves that allowed you to change to guns of other thread patterns. My understanding is they now are going to do specific thread pattern on the can's LID and offer thread adaptor's to change between guns of differing thread pitch.

ATFE doesn't seem to have issue with part that functioned as flashhider and suppressor mount - only with a part that was suppressor mount only. :confused:

Stranger
October 17, 2009, 01:07
Originally posted by Artful


Not taboo as you have to ship one with the can or it doesn't go on a gun - the issue they had was YHM's design for their LID/Nielson and the replacement sleeves that allowed you to change to guns of other thread patterns. My understanding is they now are going to do specific thread pattern on the can's LID and offer thread adaptor's to change between guns of differing thread pitch.

ATFE doesn't seem to have issue with part that functioned as flashhider and suppressor mount - only with a part that was suppressor mount only. :confused:

However, that still doesn't explain why YHM isn't selling the standard QD mounts for rifles.

Artful
October 18, 2009, 10:15
Originally posted by Stranger


However, that still doesn't explain why YHM isn't selling the standard QD mounts for rifles.

according to dist http://www.major-malfunction.com/
they are...

http://www.silencertalk.com/forum/viewtopic.php?t=43859

Posted: Sun Aug 16, 2009 5:22 am Post subject: YHM selling 5.56 & 7.62 QD mounts again

--------------------------------------------------------------------------------

YHM has started selling Phantom 5.56 & 7.62 QD mounts again.

Still no word on the Cobra pistons/mounts, though.
_________________

and


Posted: Mon Oct 12, 2009 6:46 pm Post subject: Re: YHM selling 5.56 & 7.62 QD mounts again

--------------------------------------------------------------------------------

Artful wrote:
MAJ MALFUNCTION wrote:

Still no word on the Cobra pistons/mounts, though.


Has this changed at ALL?

YHM has modified the Cobra piston, so that it uses a threaded insert - the inserts will be available from YHM in varous thread pitches and can be purchased as an accessory at any time.

Stranger
October 18, 2009, 11:07
That is good news.

Our local Class 3 guy who stocks YHM suppressors said just last weekend that he wasn't allowed to order extras for his customers. Maybe he is just behind the times.

platinumdude
January 22, 2010, 16:01
So it is really worth it to a get a suppressor for a FAL? Or would that be better for something like an AR-15, or not at all?

Edit I should add, is it worth it for a major shtf moment.

akabaron
January 22, 2010, 18:53
I was shooting my 762 can that I usually use on my OSW but installed it on my 700SPSV .308 at the range Tue using full power ammo and the RO said it was so quiet it wasnt even setting off his elect/hearing muffs! And it also works double time on my AR in .223 and 22lr Ruger. Yes its worth it;)

Artful
January 26, 2010, 21:13
Originally posted by akabaron
Yes its worth it;)

+1

My FAL
http://www.youtube.com/watch?v=wMIomwkvyBQ
first shot is friends AR then my FAL with subsonic

http://www.youtube.com/watch?v=bRLdCiWeb9M

http://www.youtube.com/watch?v=UECsUQD2a5U

http://www.youtube.com/watch?v=0ZHlv87KISE

http://www.youtube.com/watch?v=taL7Vmip39s

http://www.youtube.com/watch?v=sQm9rcgnD3w