PMM Address the SCAR 17 & 20 gas system that operates it.
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- čas přidán 5. 09. 2024
- This video covers 95% of anything someone will need to know regarding the FN SCAR MK17 & MK20 Family of Weapon systems, As well major considerations when choosing to suppress either Rifle.
3 years later I feel like this is still THE must watch video for scar owners, suppressed or unsuppressed. And if you own a SCAR 17 you must purchase the gas jets.
..I did. The ‘1.45’s’ for the 17..right after watching THIS vid actually.
Have you guys heard of the scarbarator? No need to change gas jets, scarbarator has 10 different settings. Adjust on the fly with out having to change gas jets.
@@m118lr hows it running? what can are you using?
Jarod, you are so well spoken and easily understood.
Just purchased a scar 17 as my first rifle.
God bless you for your contribution to. make the scar17 a better rifle for all of us!
I am so glad I found this video. I am purchasing my first SCAR soon and have been watching so many videos and this one is the best and it is 3 years old. Thank you. I will be in contact after I get mine as I have questions.
Dang PMM, what a great video. No wonder when my cart is full it is worth it.
This would be a great video to watch for all future SCAR buyers, and suppressor buyers.
I’ve had PMM cut, pin, and weld my SCAR 16, and 17 barrels. And jet them for Surefire SOCOM suppressors. They did a great job and I highly recommend them.
Also love their SCAR safety’s and extended bolt release.
what gas jet did u go with for your socom on your 16?
Car muffler and silencers have so much in common because the same guy invented them thank you Maxim I just learned that after a life time of cars and silencers
I absolutely love my Scar17. It's my doomsday battle rifle.
Great informative video... This should be a must for anyone that remotely thinks that a SCAR17 should be a magical perfect platform since it's an FN and it costs a whole lot of dough...
I'm tired of hearing from people complaining on SCAR failures which at the end, you realize that these individuals self induced these issues.....
My 17s hasn't failed once! Don't tell anyone I just bought it and haven't fired it yet.
Great information! I personally appreciate you going through this info. Thank you! 👍🏼
thanks for taking the time to make a video. going in depth into some major considerations of setup.
.would have like to hear your thoughts on the OSS line of suppressors. Their different take & innovation on the back-pressure game in theory FOR ME makes a lot of sense. Seems it MIGHT a work well for the SCAR. IF I’m following your line of thinking (suggestions), it’s “try it and see HOW it performs.” Bet I’m close...
OSS cans spit hot fire. They are very quiet but not great for night work. Just something to consider.
@@sambumgardner3480 ..it’s the virtual “jet engine” compressor concept which as I understand it, not only lessens that ‘back-pressure’ issue but in theory ALMOST reverses it. I don’t have the ability to test the theory as I have NO OSS suppressor so kind of a moot point at the moment. ANYBODY running a SCAR with an OSS can..?
@@m118lr I haven't ran into any SCAR and OSS but seen plenty of AKs & ARs (DI) running them reliably.
I never got the idea of gas jets... isnt it easier to open the port a lot and then just use the gas valve ? Why didnt fn just added more settings to it...
On a factory SCAR 17(no can), what would be the approximate comparison of gas jet reduction size relating to running the gas regulator in the "suppressor" setting position compared to "normal" setting? In other words would running a jet size of 1.35 in the "normal" position be comparable to running the gas regulator in suppressed position with the factory 1.45 jet?, as a theoretical example.
Brutal. Too spooked to put my SRD762TI direct thread on now.
I have the SRD762Ti-QD on mine and I'm happy with it, but I don't run mine hard.
Gunpowder doesn’t burn oxygen in the air. It has its own oxidizer.
I wish i would have seen this BEFORE getting a Omega 300 now im m kinda stuck with it until i get a Surefire i guess... I was told By SilencerCo & SilencerShop that the Omega would be perfect for the scar NO issues.
Just change out the gas jet to a smaller size than the factory 1.45.
Great video
Great video and info
Wow! 14.5 bar at sea level is simply crushing. One bar is one atmosphere pressure which is approx 14.7 psi.
I miss-spoke 1 bar is 14.7 PSI which is sea level.
I have a Silencerco Hybrid 46 can, would that be ok for a SCAR 17s
Great video, the 40 cent a round for 308 is hilarious and depressing to hear now lol.
Elcan Specter 1.5x6 & OSS Helix 762. Done.
Well dang, I have the Omega 300. Would your jets be a fix for the pressure? I don’t care about recoil, just want to keep gun reliable.
Amazing info
Thanks for the extensive video, man. Once I find my sweet spot (bolt locking back) and go 1.5mm up with my gas jet (suppressed), do I only need to adjust the gas block to un-suppressed after I take the can off? Or do I need to replace the gas jet after I remove the suppressor?
P.S.You gotta put up the video with launching the scar in the air!
What do you think of the Mototech SCARburator Gen3 for a variable gas system.
I agree except that the original intention of the silencer was to make firearms more docile for women to shoot. It's in maxims first ads. It's also in his patent application.
There isn't less oxygen, it's just at a different pressure. If not, you wouldn't be able to start a fire. It has more to do with the pressure affecting the ability to use it efficiently.
Mass doesn't change with temperature, velocity does. Modern powders are very temperature tolerant.
Trim is an actual aerodynamic surface and has to do with a physical surface, not anything to do with the engine. You are thinking mixture and timing curves need to be changed for altitude.
All of these things are taught in Artic warfare and mountain warfare schools. Except the engine/Tab thing. That's different.
I think FN could have fixed the electronics problem but the contract didn't pay for it, nor did it require it. They needed to add a urethane buffer, like every other 7.62 battle rifle (HK etc.)
When you said drop the size by 1mm, I think you mean .1mm. A mm would be crazy.
Thank you for your video and products. I use them in customer products all the time.
Hey there, my SCAR that i just got used has some canting in the rear bolts. Is this a permanent damage or can I just buy new bolts? Thanks!
If he bolts are canted chances are the holes in the reciver are oval now as well and that is not reversable.
@King Tutt Because the SCAR doesn't have a need for a buffer spring and tube. The polymer stock was designed to absorb some of the recoil force of the bolt. The SCAR also shoots a 308 round which is much more potent than your 556 AR.
If only I could find a 16 and 17
Are a few canted screws in the rear normal out the box? Got my 16s new and not all screws are flush, system is stock beside a pmm lower guard/extension.
I honestly don't know without seeing it
Good info, would you say using a nato 7.62x51 case with single powder be the best to test the minimum hold test? Since its probably the least charged round type found normally.
What's your opinion on using a scarbarator gen
3. Then I wouldn’t need to change my jets at all
I don't run my SCAR 17 suppressed, would i still want to change the OEM gas jets? Will it extend the life of the rifle?
Is the offset position for the gas valve selector intended for suppressor use? What position should the valve be in (vertical or 45-degree offset) when unsuppressesed or suppressed?
45* is the supressed setting on the gas valve
If I have a stock 16 inch scar 17 barrel and I wanted to use the surefire RC2 would I need to get the gas jet changed out?
33:39 if you just want to know about suppressor
What about an AAC Cyclone or 762 SD, using a 1.3 gas jet on a mk17 ?
I would like to know this as well. I just bought a AAC 762 SDN because it was only $550 at my LGS. I have a 1.30 gas jet on my Mk 17 as well.
You kept almost mentioning the SAKER but never did. How does the mk17 run with a SAKER??
With a metal hinged stock such as the the kdg or krg. Would using a rubber buffer help mitigate the impact and save the rear plate bolts? Physics obviously dictates the weapon issues. Things like the hi-desert dog buffer piece or the mototechengineering buffer piece.
No.
I have a question sir. I own a scar 17 and just ordered a omega 300 for it. Of course I watch this video and it’s not a good can for the scar. My question is if I gas my scar down to run suppressed with an omega 300 that should fix the issue right? I just ordered gas jets and a gas jet tool from you (PMM) thank you
So how did it work out?
I imagine that you have to tune it way down for the Omega 300 to not beating your SCAR or gas in the face, that will likely affect the reliability of unsuppressed use.
I would get another suppressor OR try the 3 position gas regulator so you have a greater range of adjustment from unsuppressed downward.
@@JohnZ556 my dam can is still in jail! But surprisingly the gas ports are really easy to change so I will have an array of gas ports and will just fine tune it. I should have got a different can 🤦🏼♂️ but I hate the buying process so I am stuck with it
@@Milkywayboy Geez, but if I were you, I would just invest in a few cans that can cover all the basis. So going forward it won't be so painful even if I need more. Sandman, Nomad, Mask HD, OSS 762ti, wolfman just name a few.
@@Milkywayboy I would just get a 3 position regulator for now, so you don't have to tune the gas jet so low that sacrifice reliability for anything other than using the Omega.
@@JohnZ556 that’s a good idea do you know who makes it? I do have an octane 45 also. Now all I need is a 22lr can and a 556 can
Great vid
does the smaller mm jet screw mean venting more gas? How does that work? Thanks.
Would a metal lower for the scar improve harmonics issue’s
No
@@jarodlegsdin993 should I be worried about installing a aftermarket aluminum lower is there any cons besides weight increase?
@@DG-pk3fh there are no quantifiable reasons for an aluminum lower you gain nothing from them other then the use of .308 pmags🤷
@King Tutt take the associated cost of your new lower avg of $400.00 then the cost of a 17 MAG lets say $50 that $400 gets you 8 mags unless you have some sort of Uber loadout 8 mags is more than your gonna carry need🤷
@King Tutt Cringe
Is the Scar 17/20 supposed to cycle rounds normally if the gas regulator is in the "suppressed" 3 o'clock setting with out a suppressor attached? I am getting mixed info, some say it should only cycle with a can attached or it's over-gassed, others say it should cycle normally with or without the can in the suppressed position, the suppressed setting is just to bleed off excess gas.
What's the real story?
non military scar 17 gas block has 2 settings. standard, and "adverse" run at 3oclock unless you dont cycle because "dirty" then run 12 oclock if you must. never tell fn you ran supressed
Nice UTM in front of that 20S optic. ;)
Just curious can you swap a 17S barrel with a MK 20?
No sir they are totally different
What grain bullet do you suggest for the 17s
...do the OSS cans survive full-auto?
Have you tried a rugged radiant on a scar 17? what size jet would you recommend?
No We have not.
Anyone with SCAR 17 and an OSS flow thru type
How does the Specwar762 run with the S17?
Pretty overgassed as it very large and has a ton of coned baffles
Do I see an F2000?????
Yup, I got lucky and got one of those.
Do you know a rough approximation of how much overall length would be saved on a scar 17 if I were to use your pin and weld service with a saker asr brake?
"less oxygen at higher altitude" im sorry but thats not how smokeless powder works.
My OSS can runs awesome on my 17
The OSS Helix can has the least amount of back pressure compared to the rest of the suppressors right?
@@darith27 yup
Yeah, I was seriously wondering...
Have new OSS Suppressor for my new Scar 17. May not hide the flash, but don't plan on getting shot at! Lol
I have a 17s 10" sbr barrel by HDD that I am running with a AAC 762sdn6, shooting Beck Ammunition subsonic 308 168gr A max. Is there anything I can do to get it to shoot subsonic suppressed AND cycle. In this configuration it is basically a bolt gun. Any recommendations. I would be glad to send the upper and ammo to you if needed. Thank you in advance.
L
Did you ever get this sorted out? I also have a 17s suppressed with a Q Trash Panda & unable to get subsonic to cycle though. Currently shooting PPU 7.62x51 200 grain. Maybe subsonic just doesn’t have the back pressure to move that massive bolt.
@@wallstbull1 I replaced the gas jet screw with the largest PMM sells which was the 2.0 or 2.5, I can't remember, but I haven't had a chance to get to the range. Everyone I talk to tells me that the bolt is too heavy for subs, I'm shooting 168gr A max which is as light as you can go and still be sub. If I can get to the range I'll let you know if anything changes.
@@leroyrichardson6923 thanks much for the info and good luck!
The scar 17 isn't capable of cycling 308 subs
@@gorps I’m thinking it’s because of the weight of the bolt/bolt carrier that it’s unable to cycle. Yeah?
You say multiple times up or down one mm. Did you mean to say point one mm?
My mistake .1 increments are a good place to go.
Example if you have a 1.6mm and want to go up you put in a 1.7mm.
I'll have to correct the video
Correct the variable should be .1MM up or down I.E. If you have 1.6 go up to a 1.7
Still doesn't know what a roll pin punch is. haha
100 times .40 is 60 guys. Not 40.