this came up on the general discussion board and i think will eb better answered here.

it was addressed that there has been concern over bullet stability fireing through a can with SBR's, my question is how short can you go and have no malfunctions..
(baffle strikes)

and my next question is will the output sound while useing a can be the same as with any other barrel. will the length effect the sound reduction or efficieny of the can?
Will the can be more or less prone to carbon build-up, with SBR's?

i am asking these questions because in the future i would like to have a 7.5" noveske bbl with a AAC can either SCAR or m4-2000. i am just now realizing that it could possibly be a bad set-up to run.

edit- my apologies, i just found this thread and it answers the majority of my concern. im still interested in the reliability of a suppressed SBR
http://www.ar15.com/forums/topic.html?b=6&f=20&t=210911

Quoted: this came up on the general discussion board and i think will eb better answered here. it was addressed that there has been concern over bullet stability fireing through a can with SBR's, my question is how short can you go and have no malfunctions.. (baffle strikes) you can go as low as 7.5, wether or not your warranty on your can will cover it or not, is something you'll have to decide when researching the companies you want to go with and my next question is will the output sound while useing a can be the same as with any other barrel. will the length effect the sound reduction or efficieny of the can? Will the can be more or less prone to carbon build-up, with SBR's? the smaller the barrel, the more than likely the louder rifle will be, even with a can on. Depending on the company you go with, carbon build up shouldn't be a worry unless you are doing some serious full auto testing. i am asking these questions because in the future i would like to have a 7.5" noveske bbl with a AAC can either SCAR or m4-2000. i am just now realizing that it could possibly be a bad set-up to run. i am not sure on AAC's specific warranty, but I know they advertise their cans to be one of the toughest around. There have been video's of OPS Inc and also AAC cans that were shot 100 rounds through on 7.5 barrels...search around, you'll find them...

thanks,
i just found the can forum and ive sent some IM's to specific owners, may also try to contact AAC if the warranty information isn't readily available on their site.

The only mfgr I've found from personal research that will warranty a 7.x" bbl is American Mfg, specifically the Triple-X Warrior.  But based on what I've read about the difficulty in getting their products, I'm hesitant to order one.  

Quoted: The only mfgr I've found from personal research that will warranty a 7.x" bbl is American Mfg, specifically the Triple-X Warrior.  But based on what I've read about the difficulty in getting their products, I'm hesitant to order one.

Mike Klos (American Mfg) is no longer in business.

that must've been recent, because I corresponded with Mike via email about 4 months ago.  

Consult the MFGR.

I used a TAC-16 on my 11.5 SBR, with no problems whatsoever. Yes, it was a bit loud, but it worked. Same can on a 20" was significantly quieter.

Quoted: that must've been recent, because I corresponded with Mike via email about 4 months ago.

As of October.

Quoted: Consult the MFGR. I used a TAC-16 on my 11.5 SBR, with no problems whatsoever. Yes, it was a bit loud, but it worked. Same can on a 20" was significantly quieter.

most, if not all major mfgrs will allow 11.5" bbls; when you get below 10.5" the field narrows considerably.  

Quoted: Quoted: that must've been recent, because I corresponded with Mike via email about 4 months ago.   As of October.

roger that.

OPS inc., IIRC, allows use of their cans on 7.5" barrels (Contact Steve @ ADCO about this).

Quoted: Quoted: Consult the MFGR. I used a TAC-16 on my 11.5 SBR, with no problems whatsoever. Yes, it was a bit loud, but it worked. Same can on a 20" was significantly quieter. most, if not all major mfgrs will allow 11.5" bbls; when you get below 10.5" the field narrows considerably.

I also used it on my 7.5. Brain fart. That's what i meant to post. I've used it on an 11.5, and a 7.5

Quoted: Quoted: Quoted: Consult the MFGR. I used a TAC-16 on my 11.5 SBR, with no problems whatsoever. Yes, it was a bit loud, but it worked. Same can on a 20" was significantly quieter. most, if not all major mfgrs will allow 11.5" bbls; when you get below 10.5" the field narrows considerably.   I also used it on my 7.5. Brain fart. That's what i meant to post. I've used it on an 11.5, and a 7.5

Did you have any issues on your 7.5 bbl, e.g. baffle strikes?  Is the TAC-16 overbored enough to give a little forgiveness if the bullet doesn't completely stabilize?  Mike Klos said that the reason he'd warranty his cans on a 7" bbl is because they were slightly overbored.  

I really want to suppress one of my 7.3" SBRs, but I'm skeert.  

Quoted: Did you have any issues on your 7.5 bbl, e.g. baffle strikes?  Is the TAC-16 overbored enough to give a little forgiveness if the bullet doesn't completely stabilize?  Mike Klos said that the reason he'd warranty his cans on a 7" bbl is because they were slightly overbored.   I really want to suppress one of my 7.3" SBRs, but I'm skeert.

No issues whatsoever. Barrel was a M1S 1:9. It was a bit lous, but not too bad. Only baffle strikes i ever had was with a 11.5, with a friend shooting, and the can came loose. Never had any strikes with the 7.5. As for whether it's overbored or not, ya got me. I was able to fit a 1/4" dowel down the holes, so I'm not sure what that says.

i shot a aac ranger on a 7.5" barrel 1/7 twist for a while without problems.  aac does not advise this however.  called manufacture of rifle.  they said they run suppressors on 7.5" full auto all the time and never have problems.  having a suppressor on this short of a barrel did not produce what i was looking/listening for, so it is now back on the 14.5".

i will contact adco about that.

i emailed AAC and they will not warranty a suppressor used on a barrel shorter than 10.5"

I run an AAC M4-2000 on my 10.5's without issue.  I'll soon have a SCAR-SD as well.

I took my 11.5 with suppressor out today for the first time and it ran great. Sound level is a little less than a .22. No cycle problems and it shot dead on.