Modifying a FAL gas plug for suppressor use

[@lt.nukeyB0i]

Much appreciated! I couldn't find any video explaining what a gas plus is. Thanks pal!

[@SP-wk1en]

Much appreciated. I still have a spare sitting on the workbench intended for this.

[@Antskillet]

Great work man! Can you buy chance do a l1a1 Canadian sporter plug? It’s a tad different then the one you worked on here.

[@stimpsonjcat67]

The inch plugs are different critters for sure. I feel the Brits made everything more complicated on the FAL...although I do like the mag release. I do Inch plug mods, but it's a bit tricky. Basically, I weld over the cutout, grind it out to what I think approximates the 5/64" hole in the metrics, or really just shy of that, and then I send a small round file along for the owner to tweak the cut with if necessary.

[@Antskillet]

@@stimpsonjcat67 yes they did haha. That’s awesome! I’m starting the process on the tax stamp very soon I’ll be in contact with ya in the future thanks a lot man really cool what you do!

[@chrisolson3372]

If the suppressor is adding extra pressure, then wouldn’t it work/ cycle better with a larger hole?

[@stimpsonjcat67]

That's the problem, with the can added, a properly operating FAL will now have too much pressure and the system starts taking a beating. The reduced hole size in the plug reduces the amount and pressure of the gas getting to the piston head so that it is the same as the pressure the piston head sees with the can removed and the 'normal' gas plug installed.

[@grassbag1]

Interested in doing this on a SAR 48 plug if I can find a correct spare. The plug I ordered a few months ago looks different than the one I pulled off my rifle.

[@stimpsonjcat67]

Hit me up when you find one.

[@jamescorless8283]

Were did you get that plug, dsa doesn't sell them anymore. I have a metric fal.

[@stimpsonjcat67]

This is a plug I modified for someone. So they sent it to me. I am not sure who has metric plugs in stock. Try: www.gunthings.com www.sarco.com www.apexgunparts.com

[@logicalguy488]

You could just drill a smaller hole opposite the larger hole and just turn the gas plug around.

[@stimpsonjcat67]

No, you cannot. Doing so will expose the front sight disk to pressure it cannot withstand. At least one person has tapped the gas port from the bbl to the disc and added a set screw to impede the high-pressure gas. It's a great solution, but not one suitable for most owners.

[@thedesignerblacksmith5953]

@@stimpsonjcat67 uhh, may I ask? How about you change your gas regulator and/or maybe also your gas block vent hole on the top?

[@stimpsonjcat67]

@@thedesignerblacksmith5953 Not sure I understand the question. You can't get enough regulation to make a suppressed FAL friendly by just opening the gas regulator, and even if you had a FAL where it did, you're just increasing the high-pressure gas released at the gas port, which makes the rifle loud. The modified plug essentially does change the gas block hole size, but only when needed.

[@thedesignerblacksmith5953]

@@stimpsonjcat67 thank you. That can answer my question too

[@orionharmon]

So i theory you could drill out the grenade setting and have a two port gas plug?

[@stimpsonjcat67]

The problem with that is it exposes the underside of the front side disc to very high pressure. At least one person has done that mod by tapping the gas port hole through the block and adding a set screw under the disc.

[@orionharmon]

@@stimpsonjcat67 so i drilled my gas block out with a #29 bit and tapping it at 8-32 shot it today and it ran very nice suppressed and best part was being able to turn the plug and run unsuppressed

[@stimpsonjcat67]

@@orionharmon Awesome! It really is a better mod, but not for the faint of heart.

[@m57firingdevice]

@@orionharmon any chance you've got pictures of this mod? I'm having a hard time visualizing it

[@orionharmon]

@@m57firingdevice I'm currently working on a second plug since my carbine Dsa broke the OEM plug so if all goes well I may make a video on it

[@snpr154]

Are you making these for sale? Thanks

[@stimpsonjcat67]

I only modify plugs people send me...for donations.

[@snpr154]

@@stimpsonjcat67 gotcha! When I get one I'll dm you! Thanks

[@joecoastie99]

How do you account for the heat treat of the part?

[@stimpsonjcat67]

The plug is not a high-stress part. It is no more hardened than any other part in the gas system and is as soft as the barrel. The TIG might take it over the austenizing temp, but I am not sure the part hardens in any meaningful way.

[@joecoastie99]

stimpsonjcat67 tanks for the info. 👍🏻

[@brokenbstring]

hey i’m not seeing a contact email on your page anywhere. are you still doing these modifications? if so ide like to send you some

[@stimpsonjcat67]

Click on about on my home page, should be a 'view email' button.

[@brokenbstring]

@@stimpsonjcat67 email sent, it doesnt come up on mobile devices.

[@Ironroots.]

Is there an email address I can reach you at? I have a gas plug I'd like for you to do this modification to if you are available.

[@stimpsonjcat67]

Go here and click the obvious. kzbin.infoabout?view_as=subscriber

[@frogchaser]

you should sell these since DSA hasn't made these in forever

[@stimpsonjcat67]

In hindsight, yes, I should have bought a pallet of these. But I modify them free and ask those that are happy with them to make a donation to my Relay-for-Life team.

[@frogchaser]

@@stimpsonjcat67 that's pretty awesome. I'm still waiting on my sandman s and I'll probably have you do this to my plug since I don't have a welder. Glad I found you!

[@stimpsonjcat67]

@@frogchaser FYI, you need a 'spare' plug, as the modified plug will not allow the rifle to cycle without the can mounted.

[@frogchaser]

@@stimpsonjcat67 Got it. I just ordered a spare from apex and I'll be contacting you soon.