FX Any plans for different sized DRS Plenums?

[coastal drifter]

I’m bringing up another question about the plentum , that being the size of the o-ring that seals it to the block. Why is it sooo thin? I changed the plentum to the larger size and it wouldn’t seal. It was centered perfectly but had a slow leak. I took it off Inspecting it and all looked good. I added some silicone grease and reinstalled. Seems To be holding air this time but I would have thought a slightly fatter o-ring in a machined cavity would provide a better seal than the tiny one being used. Something for the after market guys to consider when designing a new moderator?

a little silicone grease works wonders

 

[Leatherman]

Yes that did the job. Im still going to get another slightly fatter O-ring for when or if i remove the plentum. Im hoping a medium size plentum is in our future sooner than later. the large plentum just doesnt look good on a sporter rifle and it makes it akward to carry. I do like the look on the chassi rifles.

 

[hepkt63]

I tried the Tungsten hammer also and found it to be too heavy. I found some brass hammers on eBay and they work pretty well. I'm using the 13.5g hammer in mine.

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I also found the Plenum to be too large. I placed a couple wood dowels in two of the holes inside the plenum and that reduced the volume enough to give good power without it using a lot of air.


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Here is a picture of mine as I have it set up.


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sorry to ask, but I don't suppose you recall the length you cut the 5/8" dowels down to do you please?

 

[FLgunner]

No, I sure don't and I have since sold the large plenum and the dowels went with it! I used a set of digital calipers to measure the depth of the two hole and then cut some 5/8th inch dowels to fit. I did have to sand the ends down a bit so the plugs would tighten fully and seal.

 

[Leatherman]

FL gunner, why did you sell your large plentum? Because you didn’t like the looks, didn’t give you the desired results , decided you would just shoot lighter ammo? Just curious.

 

[FLgunner]

I just felt it was too much for the standard DRS. I'm hoping and holding out on someone to make a 20-30cc plenum that's the same size as the 12cc plenum. When I plugged it with the wooden dowels, it dropped the volume to about 30cc, which was plenty. To me it lost a lot of efficiency with that large plenum and I was refilling the air cylinder more frequently than I wanted to. Also, I was not a fan of that large block of aluminum hanging down below the stock, I think the standard plenum looks much better.

 

[coastal drifter]

I just felt it was too much for the standard DRS. I'm hoping and holding out on someone to make a 20-30cc plenum that's the same size as the 12cc plenum. When I plugged it with the wooden dowels, it dropped the volume to about 30cc, which was plenty. To me it lost a lot of efficiency with that large plenum and I was refilling the air cylinder more frequently than I wanted to. Also, I was not a fan of that large block of aluminum hanging down below the stock, I think the standard plenum looks much better.

Though I don't own one I do like the looks of them without the fake mag/plenum under them. Looks like an extremely nice hunting platform.

 

[FLgunner]

They are super light weight and accurate. I'm averaging around 850 FPS shooting 18 grain pellets, plenty of power for the critters I'm after!