Side Folding Stock for MPA Guns

MPA stock kit

MasterPiece Arms (MPA) is now selling a side folding stock kit for their firearms.  The kit comes with a stock, but will also accept any standard AR-15/M-4 stock as well via an included adaptor.

The kits come in two sizes depending on which of the MPA guns you are looking to outfit.  The stock locks into place at both the open and closed positions.

MPA is very clear in the literature that attaching this to a pistol makes it into an NFA item: a short barrel rifle (SBR).  As silly as it may sound putting a stock on a pistol is a serious crime in the United States.

The kit retails for $129.99.

Richard Johnson

An advocate of gun proliferation zones, Richard is a long time shooter, former cop and internet entrepreneur. Among the many places he calls home is


  • Thomas


    this is John Rambo, Anti-Feminist Soldier. I am posting this on behalf of
    Peter-Andrew: Nolan© also now known as Joschua-Brandon: Boehm©. I am doing this
    because, as a young men who knows Peter well, I know he has our best interests
    at heart.


    It is well known that five years ago, April 2008, I spent a month suicidal as I
    went through the process of disowning my former children. When I came out of
    that rather unpleasant experience I contacted other men who had been similarly
    affected. I realized that many men were killing themselves because of the
    criminal abuse of the family law courts all across the western English speaking

    As a direct result of this experience, and my compassion for my fellow men, I
    made a vow in June 2008 to re-introduce the rule of law into Australia and Ireland.
    Naturally, at the time I made the vow I had no idea how that might be
    done. We call it “throw your hat over the wall”. You make the vow and “figure
    it out later”.

    Along the way I have talked to many tens of thousands of men, perhaps as many
    as 100,000 men have seen at least one comment by me one way or another. What I
    heard from men in 2008 was that they were DESPERATE for a remedy for the crimes
    being committed against them in the family courts. They were DESPERATE to find
    a way to end the criminal effects of feminism on their lives. Because so many
    men told me the same thing I mistook this to mean they actually WANTED to solve
    the problems of the family courts and feminism. As I said. My mistake.

    Through very extensive research and labour, and collaborating with the best and
    brightest, the remedy for both the family courts and feminism was proven on
    2009-11-26. A mere 18 months after I was suicidal. The court meeting that I did
    on 2009-11-26 I regard as one of the finest achievements of my life.
    Regardless? The very men I risked my life to create a remedy for have ignored
    that remedy, preferring to whine, bitch, moan and complain because that is far
    more rewarding to them than actually solving their problems. If they solved
    their problems they would have nothing to whine, bitch, moan and complain

    The remedy has now been available 2.5 times as long as it took to develop and
    has proved uniquely unpopular. I am hated for even talking about it. The blood
    of every man who kills himself due to criminal abuse in the family courts is on
    the hands of those perhaps 100,000+ men who have heard from me and done
    nothing. I did all I could. They did not. It is actually very simple.

    The mechanism for men to free themselves now is the Mens Business Association.
    The MBA provides individual based services to get men out of the control grid.
    Such services may well save the mans life from suicide. Going forward? It is
    necessary to create second economy outside the control of any government
    entity. Why criminals in governments can dominate and control men via the
    economy they will continue to do so. There is no reason for them to stop. The
    MBA is the proposal of a second economy outside the control of the government.
    This is a NECESSARY ingredient for men to live in freedom.

    Only a small percentage of men will want to live in freedom. Those men who want
    to live in freedom? You are invited to watch a short update on how we are going
    in our efforts to get the second economy going. Naturally? The second economy
    will grow just as quickly or slowly as men join in and contribute to it. Those
    who want to “stick with the government run economies”? You are welcome to do
    so. I wish you luck with that because you are going to need it.

    best regards

    your brother peter

    . ,,,,, .. ,,,, .,

    • Raoul O’Shaugnessy

      I missed the part where this had any topical relevance whatsoever to the posted article.

    • Cymond

      Hey mods, this is basically spam. (If you do delete it, please delete this comment, too.)

    • ST4

      Spam. Please delete.

  • Ben 10

    Do you need to drill holes in the back of the receiver?

  • Panda

    Does anyone know if they sell just the adapter without the stock?

  • macmechanic

    That hinge assembly looks alot like the ACE LTD(Double Star Family Company) modular hinge, except for the 3 hole arrangement.. Since the main block appears to bolt beneath the receiver in the factory supplied stock hole, I have a feeling that the ergonomics are off.

    Maybe you flip the buttstock arm upside down for use wth optics.

  • Suburban

    I can tell you from experience that straight-line stocks are much better. There is a huge difference in muzzle climb. The Lage Max-11 stocks are great, but I don’t know if they will fit the MPA semi-automatics. I guess you would also need some kind of riser for sights. The Max-11 upper is about an inch taller than a standard Mac upper.

    • noob

      interesting. I heard that dogleg stocks like this one are mainly for people who have to wear a ballistic visor – the visor goes into the curve of the stock, no cheek weld possible.

      I am interested that the company sells a mac11 receiver with a 5.7 fn barrel.

      With the comparatively milder recoil of the high velocity light weight projectile, could this be a poor man’s H&K MP7?

  • The inappropriate comment is gone.

  • TKC

    I prefer the AR style stock on mine. It just fits me better.

  • cmblake6

    “Shall Not Be Infringed” ring any bells? I wouldn’t mind a folding stock on my pistols.