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Thread: BRT OPTIMUM Barrels

  1. #11
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    Edited
    Last edited by Clint; 09-08-18 at 12:19.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" EXT, 11.5" CAR, 9" PDW
    BRT Covert Comps 7.62 + 5.56 + 9mm
    BRT MarkBlue Gas Tubes - BRT EXT and PDW Lengths
    BRT EZTUNE Gas Tubes - CAR and MID
    BRT MicroPin Gas Blocks .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  2. #12
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    Edited
    Last edited by Clint; 09-08-18 at 12:20.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" EXT, 11.5" CAR, 9" PDW
    BRT Covert Comps 7.62 + 5.56 + 9mm
    BRT MarkBlue Gas Tubes - BRT EXT and PDW Lengths
    BRT EZTUNE Gas Tubes - CAR and MID
    BRT MicroPin Gas Blocks .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  3. #13
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    Quote Originally Posted by Clint View Post
    Barrel and Gas System Lengths Explained

    9.0" PDW - A BRT exclusive that smashes the conventional wisdom of a 10.5" minimum length for "serious use".
    That conventional wisdom is true, but based on a Carbine length gas system.
    We created the PDW length gas system to handle a range of very short barrels and alternative calibers by splitting the difference between existing Carbine and Pistol lengths.
    A 9" barrel and the PDW gas system are a perfect match in 5.56/.223.

    How about 2580 FPS from M193 and M855?
    This is a great alternative to 300BLK PDWs but uses common ammunition.
    Very interested in trying this barrel out and seeing how it runs mk318 62 grain otms with my sandman s.

  4. #14
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    With the 6.75 barrel, is there ammunition that would reach effective terminal velocities? Very interesting.

  5. #15
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    The 55 and 62 grain Gold Dot / Fusion loads should work nicely.

    According to these threads, they expand down to ~1700 fps.

    https://www.m4carbine.net/showthread...-Dot-55gr-5-56
    https://www.m4carbine.net/showthread...-223-effective
    https://www.m4carbine.net/showthread...sion-threshold
    http://www.le.vistaoutdoor.com/ammun....aspx?id=24446

    Quote Originally Posted by JediGuy View Post
    With the 6.75” barrel, is there ammunition that would reach effective terminal velocities? Very interesting.
    Last edited by Clint; 09-06-18 at 22:26.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" EXT, 11.5" CAR, 9" PDW
    BRT Covert Comps 7.62 + 5.56 + 9mm
    BRT MarkBlue Gas Tubes - BRT EXT and PDW Lengths
    BRT EZTUNE Gas Tubes - CAR and MID
    BRT MicroPin Gas Blocks .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  6. #16
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    This should be another great combo with the 5/8-24 thread mount and unlimited barrel rating.

    Quote Originally Posted by Furbyballer View Post
    9.0" PDW*- A BRT exclusive that smashes the conventional wisdom of a 10.5" minimum length for "serious use".

    Very interested in trying this barrel out and seeing how it runs mk318 62 grain otms with my sandman s.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" EXT, 11.5" CAR, 9" PDW
    BRT Covert Comps 7.62 + 5.56 + 9mm
    BRT MarkBlue Gas Tubes - BRT EXT and PDW Lengths
    BRT EZTUNE Gas Tubes - CAR and MID
    BRT MicroPin Gas Blocks .750" & .625"
    BRT MicroTUNE Adjustable Gas Blocks
    BRT CustomTUNE Gas Ports

  7. #17
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    Damn Clint.

    Dammit.

    Your original 16" Optimum LW barrel has basically invalidated all my 16" middies...and I've sold them all because the 16" BRT Opt soundly outperforms all of them for my mixed use (50/50 can/no-can) when all factors are considered (weight, accuracy, recoil pulse, gas system function with suppressor). And I only ever owned properly gassed barrels from BCM, LMT, and Faxon (most recently). Even my agency supervisor, an accomplished shooter and experienced LEO, was immediately impressed at the soft recoil impulse despite my gun's light weight and using just a BE Meyers ASR flash hider mount. He kept commenting on how smooth the recoil pulse was for such a lightweight gun.

    But the 9" PDW is fascinating.

    And so is the slightly heavier 16" med-con continuous taper barrel.

    Ugh.
    Last edited by BufordTJustice; 09-13-18 at 15:53.
    "That thing looks about as enjoyable as a bowl of exploding dicks." - Magic_Salad0892

    "The body cannot go where the mind has not already been."

  8. #18
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    I'd love to spin Pappabear's 338 Titanium sig can on one of the 11.5s.
    "You people have too much time on your hands." - scottryan

  9. #19
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    Clint-How is the contrast between the MPR and SPR barrel in a suppressed, LW scoped role? Have you had a chance to test the MPR on paper? I'm tempted to look at the MPR over the SPR due to the barrel steel and subzero temperatures we see here.

  10. #20
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    What is the Velocity with M193 and M855 in the 6P? I was Looking at getting a 12.5 barrel because I have 3 10.5 SBRs, and kind of want the extra inch. Also why 5/8x24 threads?

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