Phase 5 ABS – Arm Brace Stop

ABS_4th (1)

Despite swirling rumors that Sig Arm Brace is now illegal to shoulder (its not), companies such as Phase 5 Tactical are forging ahead with new products directly related to the system. The brace is known for sliding over the complete stock, making it not suitable for guys and gals with longer arms.

ABS_5th

Phase 5 has released their ABS or Arm Brace Stop. The cleverly named device is designed for brace-specific buffer tubes and when installed gives someone an adjustable length of brace. (As we know from physics, the farther apart two points are to stabilize a force, the steadier it is).

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ABS – ARM BRACE STOP

Phase 5™ Arm Brace Stop (ABS)™

Compatible with the Sig Sauer SB15 Pistol Stabilizing Brace

• Built in QD Sling attachment location

• Includes Allen Wrench and hardware

• Precision machined 6061 T6 USA made Billet aluminum

• Type III Hard Anodized satin black finish

• Fits tube diameters from 1.20 – 1.25

The Phase 5 ABS™ (Arm Brace Stop) is a billet aluminum arm brace receiver that locates the Sig Sauer™ SB15 Pistol Stabilizing Brace in most any desired location on a compatible pistol buffer tube. The ABS™ locates the Sig Sauer™ pistol stabilizing brace and prevents unwanted rotation and movement when installed correctly.

The ABS™ also includes a Built in QD feature that allows the pistol to be used in conjunction with a quick detach weapon sling system.

The ABS is available now on Phase 5’s site for $49.95. 

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Nathan S.

One of TFB’s resident Jarheads, Nathan now works within the firearms industry. A consecutive Marine rifle and pistol expert, he enjoys local 3-gun, NFA, gunsmithing, MSR’s, & high-speed gear. Nathan has traveled to over 30 countries working with US DoD & foreign MoDs.

Nathan can be reached at Nathan.S@TheFirearmBlog.com

The above post is my opinion and does not reflect the views of any company or organization.


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  • The ATF approved the SB15 in the form submitted to them. They didn’t approve it with the zillion add-ons that people now have to make it better function as a stock. These are the kind of products that the BATFE is eventually going to use to toss people in jail for shouldering their brace – because they’ll have installed it on a gun, and the BATFE will use that as evidence that the owner remade the gun to use the brace as a stock.

    • USMC03Vet

      It’s almost as though you want them to read your comment and take action. I’ve read several of these comments the past couple of days on this domain. They are going to do what they are going to do regardless, but keep complaining about free market enterprise I guess.

    • Frank

      Do the ATF actually have resources to go after gun owners? The last time I heard about them doing this was Ruby Ridge, sort of ending them doing these kind of tax revenue enforcement raids.

    • Tim U

      I could easily use this product and still make the case my intent was to use the brace as designed. I’m 6’3″ and if I seriously wanted the stability offered by the brace I would want it farther down my arm than just rammed up against the receiver.

      Your argument, invalidated.

      Don’t poke the ATF further, just enjoy what is legal while some also work on legalizing more things.

      • AlDeLarge

        I have an extended tube with a stop on it. I could extend it another 2-3″ before it reaches my elbow. That would be more than 4″ of extension compared to a standard pistol tube.

    • echelon

      No by all means, we should be pushing this until it gets the NFA removed. We need less grovelling to our masters and more teaching them their place. They might be able to put a few people in jail but they can’t litigate and jail every SB15 owner.

      But that’s our problem. We let the old bully tactic of intimidation by making an example out of someone work on us. If we stand up to them and don’t back down then we win. It’s that simple.

      Does it take time, money, blood, sweat, tears? Yes. It’s cliche but last time I checked freedom wasn’t free…

      Our problem is that we have the government deserve and we seem to like it down on our knees.

      • Go make yourself an illegal SBR, then. Why are you letting them intimidate you?

        • echelon

          Did you miss my entire point? One person doing this is just making their self a target to be martyred. Maybe in the right circumstance they could generate interest or awareness but mostly they would just be derided.

          This needs to be done en masse.

          And to beg the question – how do we know ANYBODY doesn’t have an illegal SBR already? What – other than fear of retribution – actually prevents anyone from building one today? And what about the people in Connecticut and other places that had perfectly legal firearms sitting in their safes one day and the next they magically had “illegal” objects that could potentially get them thrown in jail?

          As I said and stand by – we have the government and situation we deserve. If we won’t, collectively as a people, stand up and actually fight for what makes us truly free, then we deserve to be in chains. Which, although velvet, we are in.

          • “This needs to be done en masse.” I think you’re a lemming. You’ll jump off the cliff, but you need a bunch of people in front of you first. No one’s going to do anything “en masse” without someone stepping off the cliff first. Demanding that someone else do it is laughable, more of the usual internet tough guy talk I see around here.

            Further, I understand damn well what your point was. My point is, you’re a coward and hypocrite when you rail against intimidation while being one of the intimidated. You want to take the first step? Go do it. Otherwise, shut up. You’re hardly a revolutionary when you tell other people to go get killed in front of you.

          • echelon

            No and you still missed my point. I’m not asking anyone to do anything I wouldn’t be willing to do. But I’m also not so naive as to think that if I were to be “the first” that I’d be some sort of William Wallace and be able to rally a bunch of people behind me. Adam Kokesh tried doing that and I see where that got him…God bless him for trying though.

            By “en masse” I don’t mean “everyone else in front of and before me” I mean “everyone in agreement, of their own free will, acting on their conscience and principles as a coordinated plan.”

            And will this work? Yes. See Cliven Bundy’s ranch. Whether you believed in his cause or not doesn’t matter. It showed that when armed citizens come together EN MASSE and say “we’re not going to stand for this” that it makes the government think twice.

            I’m not some internet tough guy, I will attest to that, but I’m also not some mewling quim either. Most of our country doesn’t have the testicular fortitude to do what is necessary so, once again, we have the government we deserve.

            My real goal and aim is to hopefully inspire enough people to stop and think about things that maybe, just maybe there might be hope for the future. Maybe our great, great, great grandkids will have the cajones to stand up and do what it takes, who knows. Obviously we don’t…

    • David Sharpe

      Keep in mind that the Brace fits differently when you put it on one person compared to another, just the brace would be fine with short arms, but give it to a person with a longer arm and the brace will be at their wrist. That’s what this product takes care of.

    • As long as the SB-15 arm brace is installed on a firearm manufactured AS A PISTOL (i.e. intent, regardless of form), it’s legal. Even if you shoulder it instead of using it as intended.

      In no way, shape, or form, does it automagically transform it into an SBR.

      If the firearm it’s mounted on was manufactired -as a rifle- and it just so happens the “stock” installed on it is the SB-15 arm brace, then it is a SBR and that means $200 tax stamp and everything.

      Is it SO hard to understand? Sure, the ATF is mental, and could change their minds any minute, but instead of spewing absolute bullshit, go get yourself informed, like I did…

      • “As long as the SB-15 arm brace is installed on a firearm manufactured AS A PISTOL”

        What you missed is that the second you install the device noted in this article, you’ve remade the firearm. The BATFE could claim that your intention was to use the brace as a stock because of this device, and they probably wouldn’t be wrong. That would make it an SBR according to their new definition.

        • Alex

          That’s not what anyone has said and it is not what the ATF is saying. What they did say is that if you are the manufacturer of the firearm and that firearm’s intent was to be shouldered and has a barrel of less than 16 inches, then it doesn’t matter what you put on the back of it, whether it be a buffer tube, cane tip, Thordsen Saddle….all of the above would make the weapon an SBR due to intent. The simple application of a brace to a pistol already assembled is not a crime and cant be intended as such.

        • AlDeLarge

          Maybe, if you have very short arms. If you have very short arms, why do you need to extend it at all?

          I have an extended tube with a stop on it. I could extend it another 2-3″ before it reaches my elbow.

  • thedonn007

    $50? That is a bit steep.

  • schizuki

    Now tweak it so it bump fires. If you’re gonna poke the bear, poke the bear.

  • Krtismo

    Odin Works has a very similar setup that is more affordable also.

    It’s the SB-PT

  • Steve Truffer

    “slip over the stock , making it not suitable for guys and gals with longer arms”
    uhh, Nathan? Try this line, if its what you were going for;
    “sliding down the tube, making it unsuitable for guys and gals with longer arms”

    • MANG

      Are you being picky about the misuse of stock for buffer tube, or something else…?

      What are we scared of here? If the legality of the SIG brace is so fragile that we have to watch how we describe it ever so carefully, then we shouldn’t expect it to be around long. I’m really not a fan of the *wink wink nudge nudge* wordplay used to describe this item.

      • AlDeLarge

        “Sliding down the tube” is not only more accurate, but a better description. (I would’ve gone with “up” but either way works in context.) “Making it unsuitable” is less awkward wording than “making it not suitable.”

  • David Sharpe

    Exactly, plus some people don’t want the govt to have a registration of what they own, no matter the expense.

    • Sam Schifo

      I’m sure the NSA already has a good idea of what I own based on my search history, emails, purchases, etc.

  • $200, registration, asking for permission, asking for permission to leave the state with it

  • Adam aka eddie d.

    Two questions came to my mind while reading this:

    I.
    Is the SB15 really that prone to sliding around on the buffer tube?
    Of course I have no reasons to doubt the writer,
    it’s just I’ve never had the chance to shoot a gun with this brace yet,
    and it looks to fit quite snug on the buffer tube.

    II.
    The set screw on this clamp looks quite small.
    I’m thinking about whether it will be enough to retain the clamp
    if someone uses the built in single point QD mount with a 7 lb. pistol.
    A stronger jerking force, the gun dangling around… I don’t know.

    By the way: this older Sig Brace looks like a much more squared away accessory
    than the new version. Is this going to be phased out, or just sold along with the other one?