Suppressors Finally got my first stamps. SBR and 30BA. Woohoo!

[RotARy15]

Pics are a little dark best I could do with my phone.

I ran to a friends house and attached the muzzle brakes. I'm a little annoyed that the brake on the bolt gun is a little off time but it's too late to correct that. Doubt it is enough to cause problems.

The brake adds to the SBR's short and stubby theme which is cool.

I looked through the bores to make sure the can was aligned correctly and the bolt gun looks good. The SBR is hard to tell because the suppressor is actually longer than the barrel so the bore looks rather obscured although equally so, which I'm just going to have to assume is good.

Been wondering about anti-seize though. I was warned by a couple of people that the can could potentially spin off on a semi-auto gun and to check it fairly often. I also noticed that the can came with some copper based anti-seize on the threads. In all the fitting and checking, the anti-seize wore off and I'm curious as to whether I should use the can with anti-seize or not? Does it help removal of the can or will it cause the can to spin off on my AR? Any input would be appreciated.

I'm also assuming that when mounting the suppressor, "hand tight" means almost as tight as possible by hand?

 

[dvdt]

I just started using anti seize on my thread on cans. I plan on doing that with my 30BA as well. A little dab will do ya and that shit will make an awful mess in my experience. I recommend double zip-lock bags for the anti seize. FWIW, I also use a rag and clean the threads before and after threading anything on to the barrel.

I have never experienced a thread on can back off (and pray neither of us do) but I don't have enough experience with a semi auto to comment. I usually find myself checking the cans on my bolt guns quite a bit just to be sure. That and I like to torch my fingers

 

[K_4c]

Not sure I would run my 30-BA on the SBR..... You'll love the TBAC (hand tight is hand tight not a gorilla grip...).

 

[KYS]

What caliber is the SBR? Ti cans are generally not a good idea on semi auto's with short barrels.... high heat that is sustained does bad things to Ti.

 

[K_4c]

maybe a .300 blk with subs only.

 

[RotARy15]

The AR is 300 BLK.

The fire rate on the SBR will be controlled. I haven't even ordered a second can yet so I decided to get a brake for the SBR just because it will be at least 7 months before I have a dedicated semi-auto can. I was told TBAC would be coming out with a 30cal can rated for more heat so I'm waiting to see what comes of that.

 

[gixxerk8]

Congrats on the stamps, now the fun begins. I use a dab of anti seize on all my cans. My 30p-1 runs cooler on the sbr 300 blk running subs than the 308.

 

[jwsnydes]

I was wondering on this type of setup also with an 8 inch barrel and a 30BA.

I know the TBAC guys post here on the hide, I wonder if they have an approximate amount/speed of shooting 300BLK that would be considered too much? Just looking for an esptimated range. Can I do a mag dump or two without getting to that 800 degree threshold that I've heard Zack talk about as a breaking point for the TI material.

 

[RotARy15]

I'm nowhere near an expert but for my use, I plan to just keep the can from getting to the point that it would immediately burn me on contact. The hotter it gets the faster it will wear from the blast. Right now, I don't have anywhere near the funding to fire that many rounds. Mostly just messing around with loads at the square range so I doubt I will run into overheating issues.

 

[jwsnydes]

I'm nowhere near an expert but for my use, I plan to just keep the can from getting to the point that it would immediately burn me on contact. The hotter it gets the faster it will wear from the blast. Right now, I don't have anywhere near the funding to fire that many rounds. Mostly just messing around with loads at the square range so I doubt I will run into overheating issues.

Sure, I hear you. I'm just trying to figure out if I did a pair of mag dumps back to back, with subs or supers, if I would be in the danger zone temp wise. And if I would, I want to look at getting another can and leaving the TBAC on my 308.

 

[Zak Smith]

Should be no problem with subs.

Even full power .300 BLK/Whisper has roughly a third the powder of .308, should be OK depending on load and barrel length, just keep an eye on the temperature.

 

[jwsnydes]

Should be no problem with subs.

Even full power .300 BLK/Whisper has roughly a third the powder of .308, should be OK depending on load and barrel length, just keep an eye on the temperature.

Thanks Zak for the response.

I love my 30-BA so much, I just don't want to screw it up.

 

[KYS]

Sure, I hear you. I'm just trying to figure out if I did a pair of mag dumps back to back, with subs or supers, if I would be in the danger zone temp wise. And if I would, I want to look at getting another can and leaving the TBAC on my 308.

If you run an 8 or 9" barreled upper like most do for the 300 blackout then you are going to see over pressure with a suppressor attached. The gas system is pistol length as they were designed for subsonic function at full auto. Basically kicking the legs out from under the subgun category. Taking a 30 cal bullet and having it fill a specific roll as a CQB type setup.

You could do a 4 or 5 mag dumps on a subsonic 300 BLK and not get much heat. They are a low pressure round. Supersonic ammo is another story.

 

[Zak Smith]

We have a bunch of customers using our .30 cal cans on 8" .300 BLK/Whisper uppers without problems.

 

[KYS]

Understood Zak, but on subsonic ammo? I have had multiple blown primers while running an 8" barrel with suppressor on supersonic ammo. On subsonic ammo it runs perfectly.

 

[Zak Smith]

We haven't had any reported until yours. I wonder if it's a throat issue. We've seen a couple rifles (not AR's) that had too tight of a neck/throat and the increased fouling would push them over the edge into high pressure as the clearances were reduced.

FWIW, I have a 10" Novekse .300 Fireball barrel with a pistol length gas system and it runs fine with supersonic loads with or without the can. That setup should have even longer gas port effective dwell time than the 8".

Do you see signs typical of premature extraction?

 

[KYS]

No, this is with an AAC 9" upper and a 762SD-N6. Just blow a primer every once in awhile on the supersonic stuff.