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Thread: 11.5" upper questions: Lightweight/Suppressor Use/BFH

  1. #21
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    Quote Originally Posted by SteveL View Post
    Do you mind if I ask where you got this information? I'm just curious because I'm just now starting to do research into SBR's and suppressors.
    PM sent......
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  2. #22
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    We are beginning to get to a point of diminishing minutiae relative to "dwell time" etc. but I understand why people get sucked into that rabbit hole. There are a lot more variables than simply "is a 10.5" barrel carbine with a can more reliable than an 11.5" barrel without one". If a suppressed 10.5" helps negate some of the reliability concerns, does a suppressed 11.5" then become even more reliable? I don't know. But I don't worry about it.

    The brake serves to protect the blast baffle because it acts as a sacrificial blast baffle itself. Blast baffles wear. That's what they are designed to do. Do you want one that you can easily replace, or one that is buried in the can and unreachable?

    Nobody asked me, but personally if I were putting together a full-time suppressed SBR I would get a 10.5" Noveske N4 and use a can with a brake mount. That can would be either an M4-2000 or an 762-SDN-6 depending on what other guns I wanted to suppress. Just because that particular gun may never get fired unsuppressed doesn't mean the suppressor can't be used on other guns.

    This does make me wonder if custom gas ports are possible through Noveske. Not a huge range or anything, but if you called them and said "I'm putting together a full-time suppressed gun and would like to buy an N4 upper with a gas port size that matches your Switchblock 'suppressed' setting" I wonder what they would say.

    While I don't agree with all of the conclusions (such as not locking back on an empty magazine) there is lots to be learned from this thread.
    https://www.m4carbine.net/showthread.php?t=33743

  3. #23
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    Thanks for weighing in here Rob. While I don't question the quality of the Noveske you recommend, do you feel it offers any advantages over the DD MK18? Why or why not?
    Steve

  4. #24
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    Quote Originally Posted by rob_s View Post
    This does make me wonder if custom gas ports are possible through Noveske. Not a huge range or anything, but if you called them and said "I'm putting together a full-time suppressed gun and would like to buy an N4 upper with a gas port size that matches your Switchblock 'suppressed' setting" I wonder what they would say.

    While I don't agree with all of the conclusions (such as not locking back on an empty magazine) there is lots to be learned from this thread.
    https://www.m4carbine.net/showthread.php?t=33743
    Rob, thanks for that tip. I may do just that. I have no desire to ever fire a 10.5" barrel unsuppressed with an AAC Brake attached, I like the Noveske barrel and with a suppressed gas port size it may be just what I am looking for...

    I will shoot Noveske an email and see what they say. It can't hurt...
    Why do the loudest do the least?

  5. #25
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    Quote Originally Posted by Iraqgunz View Post
    A stripped lower as purchased can be built into any configuration. We have discussed this many times. Depending on what it was built into, you may or may not be able to change it.
    Thats how I had always understood it. There is no "needing to be registered as a pistol"...unless maybe you live in a state that requires registration, but rarely do those allow AR pistols anyway.

    With that said, will a stripped lower alone satisfy the requirement to have a "pistol" lower if its "mated" with a short upper? Or does it actually have to be a pistol, with a pistol buffer tube and such?

    Quote Originally Posted by SteveL View Post
    I hope I'm not derailing this thread, but I've had some questions in the back of my head for a while regarding suppressed SBR's and they seem to tie in with the OP's comments below.



    I'm aware of the reasoning for going with an 11.5" or 12.5" barrel over a 10.3" or 10.5" barrel with regards to dwell time, muzzle velocity, etc. However, if you're going to be running the rifle suppressed 100% of the time, is the attached suppressor a substitue for the lack of barrel length? Will the suppressor help make up for the decreased dwell time of a sub-11" barrel? Also, if running the rifle suppressed 100% of the time, is there any reason to use a suppressor that attaches to a brake rather than one that threads directly onto the barrel?
    As Rob said, the brake serves as a sacrificial baffle. I even am using an AAC Brakeout on my 14.5" guns because of that reason, and I don't like the pinging noise after its fired.

    The main reason I chose the M4-2000 with 51T mount is Cost and Durability. I could have gotten a thread on can but then I couldn't have used it with other rifles and they do not stay put during "high volumes of suppressed fire" which I will be doing. The "QD" portion is less about putting it on other rifles and more about a secure mounting platform...it is for me anyway.

    There are only a few cans that I really trust as far as staying mounted during constant firing, and the M42000 was the most cost effective for my uses.
    Why do the loudest do the least?

  6. #26
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    Eurodriver,

    I can't tell you to be honest because I don't deal with AR pistols. One thing I can tell you is that if you do not broadcast the fact that you have said upper and keep it put away, no one will care.

    I have seen other people tape foam around the buffer tube to give the appearance of not being readily able to add a stock. The question is this. What is readily conevertible in the eyes of BATFE?



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  7. #27
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    Quote Originally Posted by Iraqgunz View Post
    Eurodriver,

    I can't tell you to be honest because I don't deal with AR pistols. One thing I can tell you is that if you do not broadcast the fact that you have said upper and keep it put away, no one will care.

    I have seen other people tape foam around the buffer tube to give the appearance of not being readily able to add a stock. The question is this. What is readily conevertible in the eyes of BATFE?
    The use of tools it seems.

    They actually said you can use a standard carbine tube on a pistol lower, as long as you don't own (and never have owned at the same time) any stocks that will fit the tube. But of course it's safer to screw on a pistol tube that can't accept a stock. We all know how easy it is to replace the buffer tube, but that's enough for the BATFE.




    Wooo my first post on m4c is quoting IG on a BATFE issue. Off to a good start!
    Last edited by Koshinn; 06-28-11 at 23:00.

  8. #28
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    Quote Originally Posted by Fire_Medic View Post
    Well because they don't have an N4 11.5, and also because they do not sell N4 barrels separately........
    While Noveske doesn't offer the N4 in an 11.5" configuration, they do have 10.5". When I last called them regarding barrels I spoke to a very knowledgeable young lady who informed me that they would sell me a 10.5" N4 barrel for my build (now on hold due to lay off). You may want to give them a call directly to clarify.

  9. #29
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    Quote Originally Posted by Fire_Medic View Post
    Well because they don't have an N4 11.5, and also because they do not sell N4 barrels separately........
    I think I'd be inclined to buy the basic N4 and make the changes I wanted/needed.

  10. #30
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    Quote Originally Posted by rob_s View Post
    I think I'd be inclined to buy the basic N4 and make the changes I wanted/needed.
    I am mulling it over, as my paperwork was already sent in with 11.5" as the size for the upper on the SBR.
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