ฝัง
- เผยแพร่เมื่อ 3 ก.พ. 2023
- 9mm form 1 suppressor using clipped and formed freeze plugs.
147g handloads where used going 950fps average during prior testing.
Unsuppressed testing shows an average of 157.0db upon various trials. Suppressed in this video the form 1 put out 125.5db average. Most of the time it will meter around 127.xx so this day was slightly quieter.
Suppressor was run completely dry and tested on a Stribog A3.
UPDATE 6/2023 -
When taken apart and reassembled not having the clips perfectly set as before has killed the low average. Sound increased by 2db on a few tests using same ammo. Clip arrangement and alignment is crucial for maximum sound reduction!
Neat. Thanks for showing how small the spread is.
Glad you enjoyed it. it generally doesn't go past 128.x but stays within a 5db spread max.
I love how it's not ate up with FRP. First shot to last shot is essentially metering the same. 1db isn't even enough to be detectable to the ear. Great job making that buddy !!
This was a weird day and I feel like I cheated the public lol. Normally I’d see a 2db higher first round. That’s still really good though. I think I need to do an updated video and you will like this one I have planned.
@@arm_usa I have always enjoyed watching your videos and the honesty that you give when you do them. That's priceless in this hobby.
And maybe do a wet run..
It's worth it for science! Lol
3 decibels is DOUBLE the loud lol 3 db is 2x louder
Logarithmic
So, I have used a couple of volume bodies, on one its been freeze plug pressed in, and the other more of a slip fit, the meter makes me wonder whats working better for me.
Sounds very good and metered very good for a FP Form1, did you clip all and align?
The clips were alternated every other cone 180deg. Sorta like this , ‘ , ‘ , ‘ , ‘ , ‘ , ‘
First and last plug weren’t clipped
When they were all aligned it was slightly louder. Idk why except maybe the plugs stacked too tight with no spacing wasn’t effective. Offsetting them 180 showed a 2db drop over aligning.
@@arm_usa 2 db is alot for just 180 switch aligning every other baffle.
Thats how I set up mine in the cad software too.
I had no idea it would make such an improvement, and now Im wondering if I should design the entire can to stack & bolt on linear extensions to further reduce noise in a continuous [' , ' , ' , = ' , ' , ' ,= ' , ' , ' ,] fashion.
Are you thinking like a spacer in between a few cones that has a coaxial setup? I thought about it but never took action in it. Might real gases longer cooling them further helping suppression.
Can you explain in more detail please? I understand the graph alternation, but what are the equal signs repping?
Thanks
Better get your freeze plugs now while you can , before you have to apply for them register them
Do you have a parts list for the build? I want to try my hand at building one but don’t know what exactly to get
Sure do. Send me a email @
arm_usa@yahoo.com
Earned a sub from me!
Hey thanks,I’m gonna start making more vids of testing.
Did you clock align your clips, noon, 6 o'clock ?
Thanks for the upload!
Hey Clint,they were 180 alternated. So 6,12,6,12 etc. A straight alignment was slightly louder on the meter. Not really noticeable but it was around 1.5-2db louder. I tested this on 2 different days and it was the same results and not a fluke. I’m thinking that the freeze plus being so tightly spaced has something to do with it.
Wow, that's crazy..I wonder if it's cuz we're into a longer design? Someone mentioned a spacer chamber, I'm not sure if there's a difference of 10 plugs opposed to ># of plugs... Do you remember spacing or tip to tip? I put the buds on and it's jus this can sounds really good, has excellent tone, Great Job
They say around 2db is when one can tell the difference. I wonder if that's the shooter or bystander?
@@clintmullins8670 thanks man! when the freeze plugs are stacked the tip to tip is about .335". Thats close. might be too close. It obviously does good but its heavy. I do have a spacer inbetween the last cone and end cap. its about a .500 spacer i believe.
I think similar results could be had using 10 plugs and space them out better. Static spacing usually always works with subsonic stuff like this so i'd just space em out equally. having the plugs to close to each other did make the aligned clip worse. spacing them out and less plugs might benefit just the same with less weight!
Wow .335? And I saw below supers are 129db!
Excellent! Length has to be helping here! I'm also on board with the static and higher distal. I think 10-12 is the general consensus, but it may allow frp to creep in. Good luck! I hope to see more from you soon
What the specs on the freeze plugs
They are 34.3mm in diameter but I don’t remember the part number. They are the Sealed Power brand
How many plugs did you use?
16. There might be room for 18 but I wanted a decent size distal. If I went direct thread and not used a griffin taper lock device maybe 20-21 total
@@arm_usa ahh ic. How long is your can? Here I was thinking 9 in a 6.5 can was too much for 9mm haha. I hear ya on keeping some distal room too. for running cheap supers
9.25” from furthest points. 8.5” aluminum tube. Supers in this are still high 129.xx area. Length is your friend in suppression so if you went a tad longer you’d be a tad happier ;)
What muzzle device are you running with the taper mount?
Sorry late reply. Griffin Hammer Comp
But but but muh 17-4 lol
lmao,wish it was 718 inconel so i could run 50 mags of full auto all back to back!!!