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Direct Thread vs Quick Attach Suppressors

We get a lot of questions asking about direct-thread vs quck-attach suppressors. This is often one of the first things to decide when picking a new suppressor, and there are pros and cons to each attachment method. Silencer Mounting SystemsSilencer Mounting Systems Let's quickly go into what the different mounting systems  are - as well as the advantages and disadvantages of each:

Direct Thread

A direct thread suppressor is the simplest type of mounting system.  In this case, you simply have a weapon with a threaded barrel and screw the suppressor directly 0nto it. Think of the movies where somebody is attaching the suppressor directly to the end of their barrel - this is a direct-thread mount. The primary advantages of direct thread suppressors are simplicity and bang-for-the-buck.  Many people also associate increased accuracy and more repeatable Point-Of-Impact shifts with direct thread suppressors; although, that is changing as newer and better mounting systems are coming onto the market. The primary disadvantage of direct thread suppressors is that they can tend to come unscrewed on their own if you're doing a lot of shooting. As a general rule, most people prefer direct thread suppressors on bolt action and other single-feed style weapons; although, that isn't a hard & fast rule.  There are several direct-thread suppressors that are made specifically for high-volume weapons - like Griffin Armament's Spartan 3 or Sig Silencer's SRD556.

Locking Quick Attach

When most people think of a 'Quick Attach' suppressor, they're typically thinking of a locking quick attach.  In this case, you'll thread a flash hider or muzzle brake onto your barrel  (which still has to be threaded) and the suppressor will lock onto the mount instead of threading directly onto the barrel. One major advantage of a quick attach mount in general is that the mount itself acts as an adapter.  As a result, you'll often find that people who are running a 7.62mm suppressor on their 5.56mm weapon are using a quick attach adapter since the threads of the two weapons are different. On top of that, a locking quick attach also prevents the suppressor from coming unscrewed when doing any type of high-volume shooting. As a result of those advantages, you'll find that most people tend to prefer locking quick attach suppressors on semi-automatic weapons - like the AR15. The main disadvantage of the earliest quick attach systems was a loss in accuracy - and it tends to be most noticeable with tooth-mount locking systems.  (Tooth mount systems rely on teeth around the mounting device to hold the suppressor in place.) More current suppressors, like the Sig SRD models or SureFire 300 SPS, can actually have better accuracy than their direct-thread cousins.

Non-Locking Quick Attach

A non-locking quick attach uses a flash hider or muzzle brake on the weapon; but, there is no locking mechanism at all. Earlier generations of these mounts tended to be the worst of both worlds; but, modern taper mounts have changed that significantly. There are several reasons that taper mounts work so well:
  1. They provide significant surface contact between the suppressor & mount - which acts like a friction lock.  As a result, a taper mount suppressor is far less likely to come unscrewed than a true direct thread suppressor.
  2. The taper actually aligns the suppressor better and more consistently than a true direct thread.  Even though direct thread models are excellent for accuracy & repeatability, the taper mounts are often better.
Some of the best taper mount systems include the Thunder Beast Compact Brake models.  Interestingly enough, the Sig SRD quick-attach systems are also built on a taper mount. As taper mounts improve, they're quickly taking the place of direct thread suppressors for precision shooters & hunters.

Conclusion

It's nice that there are so many mounting options available for modern suppressors; but, we realize that it can be confusing when you first start researching. If you have any questions at all about what mounting system is best for your application - please don't hesitate to contact us, and we're happy to spend as much time as needed to help you understand your options.

15 responses to “Direct Thread vs Quick Attach Suppressors”

  1. I have a Remington 700 SPS Tactical .308, 20′ bull barrel with 1 in 10 twist. I am seriously considering a direct thread SilencerCo Harvester 30. The main purpose of this rifle is hunting deer over large bean fields out to 500 yards. Also recreational shooting out to 500 yards.

    Any thoughts or recommendations you have on direct thread vs quick attach are much appreciated.

    God bless.

    S/F
    Craig

    • jeremy@silencershop.com says:

      A direct thread would be great for your bolt gun. I removed your email from here so the spam bots won’t pick it up. We will send you some recommendations via email.

  2. James Harrell says:

    I’m wanting to get 2 silencers for 1911’s, 45acp and an AR 223 and 308. Problem is finding somewhere to buy the threaded barrels. Can you recommend a reliable source for these. your website is awsomeby the way. I go there now and again and always find something interesting and informative. Thanks

    • jeremy@silencershop.com says:

      Brownells is a good source to fine 1911 threaded barrels. You would need to get a gunsmith to fit them in your gun for you. A 1911 is a great host gun.

  3. bob says:

    I was under the impression that Direct threads were used to reduce POI shift and to keep weight down. I own a Saker 762 and just bought a Savage PSR 18″ Barrel (threaded 5/8-24) and was going to buy a direct thread adapter for my Suppressor, do you think a Brake would be a better purchase or the Direct Thread adapter?

    If I buy a direct Thread mount it may be worth it to just buy a Harvester and use it as a dedicated suppressor for the weapon system later. I want a system that has no POI shift because I cant always shoot with the suppressor on the weapon because some states I hunt in will not allow me to use it and trips pop up for me on very short notice.

    • jeremy@silencershop.com says:

      Most of the modern QD systems on the market are just as accurate as a direct thread silencer. Most manufactures today recommend QD because they can have more control over the tolerances to reduce POI shift. However it comes down to personal preference as to which you use. It is very rare that a silencer produces no POI shift. It can be very minimal but the stars really have to align to not have some shift.

  4. christine says:

    There’s definately a lot to find out about this issue.
    I like all the points you made.

  5. Chad says:

    I have a Sig MPX in 9mm and an Octane 9 on the way. I already have the correct threaded piston and fixed barrel spacer for the Octane.

    What would you do with the bare threads when the can isn’t attached? Pistol thread protector? Hand tighten the thread protector back on? Something else?

    Does the MPX have a flat or beveled shoulder? I assume that the Octane is flat. Should I care that they aren’t the same?

    Thank you for sharing your insights!

    Mr. C

    • jeremy@silencershop.com says:

      You can put a thread protector back on to keep the threads from getting messed up. I’m not sure about the shoulder but it doesn’t matter either way will work. Let us know if you have any questions.

  6. Larry geyer says:

    I have a mossberg patriot not threaded 300win mag I was wondering if all silencers are screwed on or is there some other way to attach them I use this gun for pig hunting only in east Texas any tips would greatly appreciated have a most excellent holidays thankyou for yout time

    • jeremy@silencershop.com says:

      All silencers thread on to the firearm. They might attach via a muzzle device but that requires a threaded barrel as well. There are several places that can thread your rifle for around $150.

  7. Justin says:

    Something else worth noting in your article is the additional weight of having an adapter mounted option vs a direct thread. The difference isn’t huge but if you don’t plan on removing the suppressor very often you can save weight by going the direct thread route. I only remove mine when I am cleaning the rifle and sometimes not even then so I went the direct thread route and I just leave it on all the time pretty much. I count every ounce because ounces add up to pounds and I try to keep my rifles as light as possible. When it comes to adding weight to the muzzle end of your rifle every ounce matters!

    • jeremy@silencershop.com says:

      A very good point and one that manufacturers are paying more attention to. Griffin, SIG and Rugged are all doing smaller and lighter mounts for a lighter total system weight.

  8. richard wadsworth sr. says:

    I have a savage 22 mag. rifle, How can I order a quick attach suppressor taper mount for the rifle?

    • jeremy@silencershop.com says:

      There is only one quick attach 22 silencer on the market. The Griffin Armament Checkmate uses a 3-lug. There are no taper mount 22 silencers. Dustin Ellermann of Top Shot fame did a test with the Griffin silencer and found that the accuracy was superb.

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