Thread: Oceania defense suppressors

from what I can see looking at the different models Ive got...over barrel gives you a much larger first chamber,a lot more support if you try to bend the plurry thing between two trees or bash on rocks and bugger all else....looking at the SS blast baffle on DPT it doesnt have the slots the normal one does so it will keep much more blast/gas in the over barrel/first chamber bit.
Ive got a waitaki muzzle forward on the wee 222 and its sound is very similar to the gunworks over barrel,its length is too but its heavier
its all swings n roundabouts.

the weight thing is weird.....I bought the shorter fatter spartan for the .308.... and had a DPT... the skinny spartan wins my vote as best for balance as it comes back further and the forwards bit is just about the same with all of them.

After speaking with OD today they strongly recommended the magnum version for the 6.5PRC. A significant price increase that I can't justify. The non magnum version was tempting at 180 grams but muzzle forward is not ideal. Will stick with the DPT but remove a couple of baffels

The 9mm ones shooting 147gr subs @ 950fps are just something else! I'd imagine they have a healthy export market for those. I took a look at the Swiss ones I think, forgot what they are, very nice but more expensive and quite a bit heavier to balance.

I've bought all mine when Gunsnz had sales 10% off, picked up the 556 one off them cheaper as had been demo'ed a few times.

Originally Posted by jackson21

The 9mm ones shooting 147gr subs @ 950fps are just something else! I'd imagine they have a healthy export market for those. I took a look at the Swiss ones I think, forgot what they are, very nice but more expensive and quite a bit heavier to balance.

I've bought all mine when Gunsnz had sales 10% off, picked up the 556 one off them cheaper as had been demo'ed a few times.

Yep I run a UTU 2 (rectangular) and it's surprisingly quiet with the subs. Though using it wet makes it movie quiet... seriously. Either some lube or wire pulling gel mostly gets rid of that first round pop, and doesn't tend to run out or evaporate quickly like water does.

Running it on a G17 in a KPOS Scout chassis gets filthy quick though. After 2-300 rounds my trigger pull feels doubled and starts to get fte/ftf malfunctions, as well as the trigger not resetting. I have to detail strip the pistol to scrub the carbon off trigger components.

HOWEVER the chassis adds to the unreliability even with no suppressor and I have reduced weight springs installed which is likely the issue. I imagine it's designed for factory specs. Also running cheap and nasty ammo adds to the filth.

How about we vote someone in who'll let us import semi auto pistol caliber carbines like MP5s/Scorpions, since they're fulfilling the EXACT same role as a glock in a chassis, and not have to deal with the chassis dramas.

Originally Posted by Macca

Yep I run a UTU 2 (rectangular) and it's surprisingly quiet with the subs. Though using it wet makes it movie quiet... seriously. Either some lube or wire pulling gel mostly gets rid of that first round pop, and doesn't tend to run out or evaporate quickly like water does.

Running it on a G17 in a KPOS Scout chassis gets filthy quick though. After 2-300 rounds my trigger pull feels doubled and starts to get fte/ftf malfunctions, as well as the trigger not resetting. I have to detail strip the pistol to scrub the carbon off trigger components.

HOWEVER the chassis adds to the unreliability even with no suppressor and I have reduced weight springs installed which is likely the issue. I imagine it's designed for factory specs. Also running cheap and nasty ammo adds to the filth.

How about we vote someone in who'll let us import semi auto pistol caliber carbines like MP5s/Scorpions, since they're fulfilling the EXACT same role as a glock in a chassis, and not have to deal with the chassis dramas.

Yes that would be nice, I'm a sig man so would go with Sig MPX to pair with my p320. MPX gas operated like the MP5, much nicer recoil pulse. Even wen had an Angstad arms 9mm AR it took throwing a JP bolt and buffer to make it run sweet, and strange slow recoil pulse with blowback.

I’m using a magnum one on my 6-5prc , ideally I thought the alpine would be fine but it wasn’t recommended. Good sound suppression and about 220 grams . I also have a hardy magnum that’s twice the weight and is over barrel. I think the OD is quieter and it recoils less.

The quietest suppressor I have is actually a mono core chinese made muz forward one I was given to test by the designer. I have not heard / seen a better one and these were only $90 landed. It is not quite market ready but the pricing gives an idea of what suppressors are really worth. The mono core is actually much quieter than baffles which surprised me. The gas / smoke is trapped very well and is much slower to exit after a shot. I guess what i am trying to explain is that the gas retention is better with this monocore, possibly because it spins the gas to the outside and cycles it back directing gas flows against each other to cancel sound

Originally Posted by Moa Hunter

The quietest suppressor I have is actually a mono core chinese made muz forward one I was given to test by the designer. I have not heard / seen a better one and these were only $90 landed. It is not quite market ready but the pricing gives an idea of what suppressors are really worth. The mono core is actually much quieter than baffles which surprised me. The gas / smoke is trapped very well and is much slower to exit after a shot. I guess what i am trying to explain is that the gas retention is better with this monocore, possibly because it spins the gas to the outside and cycles it back directing gas flows against each other to cancel sound

I have heard, but not seen myself some of the European ones, think it might have been possibly an ASE run on 338 Lapua and sound reduction was incredible. Heavy and expensive though.

Originally Posted by Moa Hunter

The quietest suppressor I have is actually a mono core chinese made muz forward one I was given to test by the designer. I have not heard / seen a better one and these were only $90 landed. It is not quite market ready but the pricing gives an idea of what suppressors are really worth. The mono core is actually much quieter than baffles which surprised me. The gas / smoke is trapped very well and is much slower to exit after a shot. I guess what i am trying to explain is that the gas retention is better with this monocore, possibly because it spins the gas to the outside and cycles it back directing gas flows against each other to cancel sound

One thing to consider about that suppressor is that it's extremely muzzle forward and extremely heavy if I remember right. Many suppressors would be quieter if those 2 parameters where increased. Any suppressor pushing too far past 300grams is getting to the point I'm not interested unless it could literally remove all sound (ie not possible). I think that as long as minimum suppression required is met I would consider length forward, and weight and to a lesser extent durability as the next items of concern.

Originally Posted by Stocky

One thing to consider about that suppressor is that it's extremely muzzle forward and extremely heavy if I remember right. Many suppressors would be quieter if those 2 parameters where increased. Any suppressor pushing too far past 300grams is getting to the point I'm not interested unless it could literally remove all sound (ie not possible). I think that as long as minimum suppression required is met I would consider length forward, and weight and to a lesser extent durability as the next items of concern.

Just measured and weighed the bastard, 285mm long x 40 x 500 grams. It is a pre production model. The interesting point for me is that the production cost + margin is only $90

Originally Posted by Moa Hunter

Just measured and weighed the bastard, 285mm long x 40 x 500 grams. It is a pre production model. The interesting point for me is that the production cost + margin is only $90

If you compare anything made in China its going to be significantly cheaper, there costs/ materials/ labour/ contractors/ etc are far far lower than ours. Look at the price of a Chinese firearm and compare it to something made in Europe.

I wish it would only cost us $90 to produce a centerfire suppressor.

Originally Posted by Stocky

One thing to consider about that suppressor is that it's extremely muzzle forward and extremely heavy if I remember right. Many suppressors would be quieter if those 2 parameters where increased. Any suppressor pushing too far past 300grams is getting to the point I'm not interested unless it could literally remove all sound (ie not possible). I think that as long as minimum suppression required is met I would consider length forward, and weight and to a lesser extent durability as the next items of concern.

This is right, people try and make overbarrel, but then there is not much gained by behind the barrel. The weight thing is not such a big deal if shoot from a bipod, but trying traditional shooting positions that weight on the end could cause problems with hard to stop rifle wavering all over place.

Missed getting a shot in on some decent reds years ago. Had a heavy barrel Rem 308 with MAE on the end. Thought was good suppressor. Was spring one year and grass was quite long. Spied some deer and had to get into a sitting position to get a shot in above grass, couldn't stop the rifle waving around. Didn't shoot and figured it out when got home. Tried rifle with on, with off.
Balanced nice off, but on just kept fighting it as centre of balance had moved so far out. Changed to a DPT, wasn't as quiet but got balance back.

Got some nice Jacindabucks for the MAE when that opportunity came along.

Originally Posted by jackson21

This is right, people try and make overbarrel, but then there is not much gained by behind the barrel. The weight thing is not such a big deal if shoot from a bipod, but trying traditional shooting positions that weight on the end could cause problems with hard to stop rifle wavering all over place.

Missed getting a shot in on some decent reds years ago. Had a heavy barrel Rem 308 with MAE on the end. Thought was good suppressor. Was spring one year and grass was quite long. Spied some deer and had to get into a sitting position to get a shot in above grass, couldn't stop the rifle waving around. Didn't shoot and figured it out when got home. Tried rifle with on, with off.
Balanced nice off, but on just kept fighting it as centre of balance had moved so far out. Changed to a DPT, wasn't as quiet but got balance back.

Got some nice Jacindabucks for the MAE when that opportunity came along.

The other thing people don't consider is that one factor is that actual volume added to the blast chamber by the overbarrel part is quite low as the isolation tube removes that extra volume to fit the barrel and usually its not optimized for volume more so the ability to fit a wide range of barrel contours. Plus having to add a second tube adds weight for little gain. It's a bit of a nessarry evil sometimes but it's not efficient weightwise. Could be more effective it the isolation tube was removes and rear sealed to barrel or if the iso tube size was minimized. The kimbers quite light so even a 300gram suppressor changes the feel alot.

Originally Posted by Stocky

The other thing people don't consider is that one factor is that actual volume added to the blast chamber by the overbarrel part is quite low as the isolation tube removes that extra volume to fit the barrel and usually its not optimized for volume more so the ability to fit a wide range of barrel contours. Plus having to add a second tube adds weight for little gain. It's a bit of a nessarry evil sometimes but it's not efficient weightwise. Could be more effective it the isolation tube was removes and rear sealed to barrel or if the iso tube size was minimized. The kimbers quite light so even a 300gram suppressor changes the feel alot.

The early Greystone suppressors sealed on the barrel without an isolator. This was a disaster with the CO2 and water vapor forming carbonic acid and literally eating right through a barrel down to the rifling lands.

The full overbarrel suppressor and ported barrel is probably the best option for shortness
With the 285 mm suppressor on the break open gun, overall length is still only what an unsuppressed bolt action is, so I can live with it but totally agree that a shorter one would be better. The gunsmith who designed it and threaded the barrel told me that for subs a long slim suppressor is superior to a shorter fatter one even if the latter has greater capacity.