Suppressors Threaded or QD can for .308 bolt gun

[marsh1]

I am building a 20" bolt gun for a host. I know the 9mm can on my Glock 19 has to be check often to be sure it has not backed off. Not a problem on a handgun but I don't think I want to do that on my bolt gun. Is the only way to avoid that a QD mount?

Thanks
Marshall

 

[seven mm]

Re: Threaded or QD can for .308 bolt gun

I have had my qd mount come loose (aac 18 tooth), my direct thread does not, I would ONLY buy a direct thread can. That being said the qd system from yhm seems to stay tight.

 

[Phylodog]

Re: Threaded or QD can for .308 bolt gun

I've got a thread on for my .308 and it's never come loose on me. If anything I tend to have a difficult time getting it off when I need to because I rarely remove it, only when I clean the rifle and that's just a few times a year.

 

[JJones75]

Re: Threaded or QD can for .308 bolt gun

I've got a couple guns that are basicaly dedicated suppressed and their cans realy get taken off also , I have however had suppressors get loose duting shooting , a properly threaded barrel this is not a problem because the thread contact is so thigh that it won't cause a baffle strike unless the can gets way off say 4-5 threads or the baffle tolerance it crazy tight.

Either way , I use a small amount of black RTV on the threads of the guns whos suppressors rarely come off this actly like a retaining compound thats easy to get off yet it won't crumble under high vibration.

My last two form 1 suppressors I desgined to use an O-ring to fit up against the shoulder of the barrel , its small enough that it doesn't cause issues with the can and barrle making metal to metal contact but it does off a good bit of resistance acting like a lock washer.

I'd hold off on having the barrle threaded untill you get the suppressor then have the threads cut to match the can exactly or just use a small dab of RTV

 

[sawhornsoff]

Re: Threaded or QD can for .308 bolt gun

Get a thread on for precision bolt rifles. I have 2 QD cans. One of those has given me trouble. Also you may get some gas leak between the mount and suppressor on the QD cans. I get some gas leak from 7.62 SD AAC and you will get some stuff blow on your front objective.

 

[marsh1]

Re: Threaded or QD can for .308 bolt gun

Threaded it is. Now for the long wait.

Thanks!!

 

[farmbo]

Re: Threaded or QD can for .308 bolt gun

I would stick with a thread on for precision bolt rifles.

 

[CS95]

Re: Threaded or QD can for .308 bolt gun

I always stay with thread on cans on precision guns,because unless you have already used the same QD can that you might get on the gun(s) you are going to use it on you dont know how the brake/flash hider/mount might effect your accuracy not to mention if it is not a rock solid mount it can mess with your harmonics among other things.With thread on cans they almost always improve accuracy.

 

[Wahoo95]

Re: Threaded or QD can for .308 bolt gun

Get a AAC Cyclone.....which threads on. I wouldn't worry about it coming loose while shooting, plus it's quieter than anything else on the market.

 

[Witch_Doctor]

Re: Threaded or QD can for .308 bolt gun

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Wahoo95</div><div class="ubbcode-body">Get a AAC Cyclone.....which threads on. I wouldn't worry about it coming loose while shooting, plus it's quieter than anything else on the market. </div></div>

+1 on the AAC Cyclone, mine is a K on a 20" Remmy 5R and its shooting .35 @ 100 yards. It is pretty cool they look like cute little Mickey Mouse head, albeit dead little Mickey Mouse heads.

 

[RTH1800]

Re: Threaded or QD can for .308 bolt gun

The USMC's M40A5 uses a Surefire QD can. Any USMC users have a comment? I am sure they work or would not be used.

 

[long-shot]

Re: Threaded or QD can for .308 bolt gun

Another vote for the Cyclone K. I love mine.

 

[slimguns]

Re: Threaded or QD can for .308 bolt gun

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: rth1800</div><div class="ubbcode-body">The USMC's M40A5 uses a Surefire QD can. Any USMC users have a comment? I am sure they work or would not be used. </div></div>

For the military it may be the best choice. The military does not always have the same outlook on goals for their weaponry as civilians though.

+1 for the AAC Cyclone

 

[Fritzcat]

Re: Threaded or QD can for .308 bolt gun

If I was going to a Can dedicated to 1 Rifle and a 1000yd precison, I would go thread on. But I have a YHM Phantam QD to use on 11 rifles and different cal. My Rem. 20" .308 seems to shoot better at 500yds with it. My AR47 7.62x39 16" shoots better at 200yds using wolf ammo. I shoot sub-sonics also in .308 down to .22, all in the same can with different QD adapters. Have not loosen anytime. So it boils down to Micro-precison, leaving no chance for error or excuse, or having very satisfactory accuracy and wide disversatility. I think ACC had a change in the QD to stop the chance of getting loose.

 

[howdydoodie]

Re: Threaded or QD can for .308 bolt gun

just waiting to get my paperwork back for mine the its going to the smith so he can thread my new barrel. glad to hear positive feedback on the cyclone.

 

[M21tactical]

Re: Threaded or QD can for .308 bolt gun

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Slimguns[/quote</div><div class="ubbcode-body">For the military it may be the best choice. The military does not always have the same outlook on goals for their weaponry as civilians though.</div></div>
Precision rifle manufacturers such as Surgeon, GAP and KMW Terry Cross typically like using the Surefire QD suppressor system. I think they know some thing about what works well for civilian and LE applications. I did my research and went with the Surefire QD that was recommended by Surgeon when I had my new build last year.

 

[teknikallysekure]

Re: Threaded or QD can for .308 bolt gun

Between this and the silencers vs accuracy thread I'm pretty sure we've covered all bases.

Silencers not only decrease but also increase accuracy, and apparently both threaded and QD are sufficient for accurate rifle use

 

[no1ryno]

Re: Threaded or QD can for .308 bolt gun

iI was in your exact shoes early this year, my can ended up bieng one i could use
on all my rigs ie. boltguns, AR 10, FAL, AR 15's so it needed to be QD
and i went with the AAC 762SD and am perfactly sattisfied but i like the Surefire brakes much more than my AAC device though from what ive experianced so far.

Ryno

 

[slimguns]

Re: Threaded or QD can for .308 bolt gun

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: M21 Tactical</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Slimguns</div></div>For the military it may be the best choice. The military does not always have the same outlook on goals for their weaponry as civilians though.[/quote</div><div class="ubbcode-body">
Precision rifle manufacturers such as Surgeon, GAP and KMW Terry Cross typically like using the Surefire QD suppressor system. I think they know some thing about what works well for civilian and LE applications. I did my research and went with the Surefire QD that was recommended by Surgeon when I had my new build last year.</div></div>

I had no idea. I guess the SF is worth the money then. Good to hear.

If it makes a difference, AAC told me the thread on Cyclone would be better than God's very hand holding my muzzle! Your guys only make rifles, what'd they know? My guys (AAC) are the suppressor guys. Maybe they just shouldn't mingle their products (Sup's and Rifles) together!

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COURAGEWOLF</div><div class="ubbcode-body">Between this and the silencers vs accuracy thread I'm pretty sure we've covered all bases.

Silencers not only decrease but also increase accuracy, and apparently both threaded and QD are sufficient for accurate rifle use

</div></div>

This one made me laugh and think I should start a "my 9mm is better than your .45" thread!

 

[krecon1]

Re: Threaded or QD can for .308 bolt gun

I'm running a SWR Omega (Old school Wraith) can on my .308. Never had it loosen up on me yet - also have ran it on my 16" SR25 without issue. My newest build, a Surgeon .338, will have a thread on can as well. I like the QDs for my ARish platforms, but like the thread cans for my bolt guns.

 

[long-shot]

Re: Threaded or QD can for .308 bolt gun

I have only seen three suppressors used on bolt guns so my experience is limited. 2 of those were QD mounts though. They were a surefire and a 7.62 SD. Both had little quirks like the surefire was fine after the first round was fired. Then it would track just fine, but the first round was 4 MOA off. The SD wandered once it heated up on one gun, but not on another so it could have been the flash suppressor.

The third suppressor I have experience with is mine. It is a Cyclone K and is exactly what is advertised. There is minimal shift (.2 mils) and dead repeatable.

For bolt guns thread on cans just appear to remove some of the variables that don't matter much on semis, but can make a difference on an accurate purpose built rifle.

YMMV.

 

[pickpick]

Re: Threaded or QD can for .308 bolt gun

I have a cyclone k. I love it. I mainly run it on my rem 700 .308, But I had the barrel of my rem700 tactical .223 threaded to match. Then bought an adapter to fit it to my ar15. I have no complaints at all about this product. I went with a screw on because I just couldn't get past the idea of having a flash hider on my bolt gun.

 

[Phylodog]

Re: Threaded or QD can for .308 bolt gun

Fewer parts = fewer problems

I prefer thread on cans.

 

[RTH1800]

Re: Threaded or QD can for .308 bolt gun

Do threads count as parts? One for each rotation? It seems that the top rifle builders and the USMC are QD people and most others are thread on. I use Surefire, but that is irrelevent. I think Surgeon, Terry Cross and the USMC win out IMO.

 

[j-huskey]

Re: Threaded or QD can for .308 bolt gun

20" rifle plus 8" of thread on can equal 28" barrel.
20" rifle plus 9" of thread on can equal 29" barrel.

20" rifle plue 6" of QD can equal 26" barrel.

Do you want a working length 26" barrel or a working length 28-29" barrel in the real world.

Damage a can and want to continue to use the rifle in the field, where did you put the thread protector???
Versus a working muzzle attachment that can take a hard bump and still mount the can later. Not a hard choice for me.

And unless you get luckier than most with a screw on can, if you damage one, what is the zero shift when the can is removed, and can you remember it under stress?

Versus the the majority of QD cans with next to no zero shift, majority, not all...

26", less zero shift can off, and no threads to damage when you take the can off. Again, easy choice for me.

 

[Phylodog]

Re: Threaded or QD can for .308 bolt gun

Great points JHuskey and a couple of things I hadn't considered. For me thus far simpler has worked fine. Not being argumentative but curious as you've more experience than I with these things:

Aside from a baffle strike with my thread on can, how could I damage it to the point of it no longer operating properly without also damaging the end of the barrel & threads? There is a lot of leverage on the relatively small threaded portion and the suppressor is pretty robust. I'd think that an event significant enough to damage the suppressor would likely wreck the barrel as well(?).




rth1800: I guess you could count threads as parts but how do they get the QD mounts onto the barrels?

 

[j-huskey]

Re: Threaded or QD can for .308 bolt gun

Phylodog Sir,

Can Damage:
Assume the worst, a baffle or something else (carbon chunk) comes loose inside the can, then you get a strike.
2nd worse, some trash gets in the can in a fall and you get a strike.
3rd worse, for reasons you can't quite figure out right now, the accuracy goes to shit with the can on, but not with it off. (Several threads to this end seen here.)
Next worse, can gets seriously overheated, accuracy degrades, and with the heat rise, you can't see the target to shoot at it, can needs to come off.

Once the can comes off, you can ding up the barrel threads to where you can't get the thread protector or the can back on. We've all seen a rifle fall muzzle down off a rack, table, truck or tree side to that one hard spot rather than the carpet...
Or you can get carbon off the muzzle in the can threads and the can won't go back on until you get cleaning gear.

Mr. Murphy is alive and well in my neighborhood.

You are correct, simpler is better.

I have them both ways, threaded and QD.

I have to be way more careful cleaning with the threaded ones than the QD's. Carbon in the threads (barrel and can) is the main issue when removing a can, then making sure I put anti-seize back on, etc.

QD mount cleaning requires only dragging a rag across the mount with a little lube.

Cleaning a rifle with a can on is something I don't do, and I don't like dragging a bore snake through a can and letting the fluff and junk get loose in the can, or drag an OTIS kit through one and let a patch get loose in one, or anything like that.

If you don't take the can off and get the carbon off the muzzle, the moisture build up will rust and ruin the crown, etc. That doesn't matter whether its a QD or screw on.

QD being quicker to mount, shorter on the barrel, and faster to maintain wins with me. Knowing the POI shift is then comes into play. JMHE

 

[Phylodog]

Re: Threaded or QD can for .308 bolt gun

jnhuskey thank you for your insight. I don't remember reading those reasons for going QD over threaded before and it makes sense. Everything I've read was basically focusing on being able to remove and reattach quickly which I've never needed to do and to me did not seem worth risking the potential for added problems with mount/suppressor fit issues.

 

[KYS]

Re: Threaded or QD can for .308 bolt gun

Huskey brings up good points.

I will say from my expieriance that I prefer QD cans on all my rifles for sake of cleaning and packing a rifle for a trip or moving from range to home. If you booger the threads on your rifle or can your pretty much screwed because that means sending the can back to the maker and having them open the hole up and cutting larger threads and guess what? you have to do the same to your barrel.

I even go so far as to say all cans should be QD. I run a QD setup on my 50BMG rifle.