First Shots with the M&P Barrel

Randy spent the weekend in the shop taking our prototype blank M&P barrel and turning it into a fully functioning barrel.

Here’s how it started out.

We’ve altered much of the geometry on the barrel’s locking surfaces to improve lock time ad other critical aspects of the gun’s function.

Setup in the mill for final cutting on the lock work.

Reaming the chamber on the lathe

Randy hard at work over the lathe on Sunday

It’s just so…

The top profile installed into Randy’s M&P

The muzzle crown

The feed ramp is so shiny it induced a serious case of A.D.D. in me

Randy and I took out his M&P 9L today to fire the first rounds. We’re proud to say that the gun ran flawlessly with 3 different kinds of ammo, no feeding or ejection problems of any sort, in fact, we had absolutely no trouble of any kind.

The new barrel is the first of 3 prototypes that we’ll be running in our M&P’s for the next few months. Meanwhile, Bar-Sto will be gearing up to produce these barrels themselves. We don’t have a time line for availability of these barrels from Bar-Sto as of yet, but they are in the works.


scott / September 12, 2011 / Random Apex


  1. Lane - September 26, 2011 @ 12:47 am

    Count me in for one for my M&P9FS.

  2. Chris - September 28, 2011 @ 5:59 am

    – Will the barrel be made for 40 S&W?
    – Would the barrel fit standard Full Size M&P’s?
    – Do you have some addition info on the benefits of the barrel over the stock barrel?

  3. scott - September 28, 2011 @ 8:50 am

    The first run of barrels will be made for the 9mm, but the rest of the common calibers will follow shortly.

    We’re going to have barrels made for both the Pro/L guns and the Full size. Barrels for the compact guns will come along as well.

    The Apex/Bar-Sto will have superior accuracy to the factory barrel as well as manage recoil differently which will change the recoil characteristics of the gun by making recoil softer.


  4. Greg - September 28, 2011 @ 7:32 pm

    will the 9mm barrel favor 115-124 grain bullets or like the 147s better?

  5. scott - September 29, 2011 @ 8:10 am

    So far, we’re not certain what bullet weight the barrel will prefer. Once we have the Bar-Sto made prototypes, we’ll know or certain.

  6. Charles - October 3, 2011 @ 7:31 am

    Hopefully a conversion .40 to 9mm for the full size will be made as well. Hint, hint

  7. Kevin - October 3, 2011 @ 3:32 pm

    Bring an extra one to the USPSA match next weekend and I will help you with your testing. Let me know so that I can find a Kydex holster.

  8. Tae - October 11, 2011 @ 10:59 am

    Just wondering if the prospect of including threaded barrels and match grade barrels were and option?????

  9. scott - October 11, 2011 @ 4:08 pm

    Yes, Bar-Sto will produce a threaded version for this too. The first run of barrels will be Match Target barrels with Semi Drop-in following shortly after.

  10. John B - November 2, 2011 @ 11:15 am

    Do you have any more info on your accuracy testing and possibly an update on availablity from Bar-Sto?

  11. scott - November 3, 2011 @ 12:04 pm

    John, We don’t have any more info available as of yet, but we will soon. We’re waiting for the official Bar-Sto prototypes to be made for final testing.

  12. Bryan Mossey - November 5, 2011 @ 1:19 pm

    Any way to get in on a pre order list to have this barrel installed in my Full Size 9mm along with FSS and sights?

  13. mr.gunn - November 29, 2011 @ 11:24 am

    is there any talk of the price range??

  14. Joe - December 6, 2011 @ 8:09 pm


    Any new developments on the M&P 9L Bar Sto barrels? Have you got an idea on the price? Can we pre order?

  15. Mike - December 11, 2011 @ 2:49 pm

    Is it possible to find out the twist rate of this barrel?

  16. John - May 11, 2012 @ 7:45 am

    Any updates? Thanks!

  17. Don Beeler - June 18, 2012 @ 1:23 pm

    First off let me say I’m a big proponent of anything APEX…my 3 M&P’s can attest to this. I’m trying to understand the increase in accuracy of a new barrel for an M&P though. It’s not exactly a 1911 that demands fitting of most anything you put into it. But with the barrel of an M&P you just take the factory one out and drop the new one in if I’m understanding this correctly. So could you briefly explain to us how your new barrel is much more accurate. I’m not doubting you…just would like to understand how it works. I won’t hesitate to get one for my 9MM’s and my .45 if you can help me understand. Thanks for your time.

  18. F APEX - August 4, 2012 @ 7:19 pm

    I think this is a bust. no news on it and its been over a year. I guess storm lake has the lock on M&P. APEX failed. Storm lake is about to release a 22 conversion barrel for the M&P. I guess were know who the best really is.

  19. Mike P. - September 6, 2012 @ 2:34 pm

    It has been well over a year since the M&P barrel project was begun and I am wondering why it takes that long to make a barrel and why there is what seems to be a near black-out on information about it? I’m using KKM barrels now because they give me around 2.5-3.0″ consistent groups and that cuts the group size from stock 9 amd 40 barrels on my guns in half. I would rather an Apex/Bar-Sto but I guess they are sequestered at a Unicorn ranch at some undisclosed location. I can only imagine how many people would love to have a sweet barrel in their M&P to go along with the sweet trigger you make…I know I would.

  20. Jason - July 16, 2014 @ 8:52 pm

    Any news on a m&p 5″ 40 fitted barrels?

  21. Toby - September 11, 2014 @ 10:21 am

    Price range and accuracy?

  22. Robert Randin - January 30, 2016 @ 8:22 pm

    I’m looking for a 9mm barrel for my mnp shield 40 are you making or have any 9mm barrels

  23. paul - February 1, 2016 @ 10:50 am

    No, we are not making conversion barrels or Shield barrels.

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