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Thread: BRT OPTIMUM Barrels

  1. #21
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    We have high expectations for velocity.

    These haven't been chrono'ed yet, but the 11.5" should be similar to a normal 12.5".


    Larger 5/8-24 threads are stronger and better, especially when suppressors are involved.

    Any 30 cal suppressor will work and quite a few 5.56 QD suppressors have 5/8-24 mounts available for them.

    The 5/8-24 SilencerCo ASR Mount works with the Specwar 556, Specwar 556K, Saker 556, Saker 556K.

    The 5/8-24 AAC 51T mount works with the M4-2000, 556-SD and Mini-4.

    The 5/8-24 Griffin Taper mount works with the Reece 5 and Optimus Micro w/ optional taper mount interface.


    Quote Originally Posted by ffhounddog View Post
    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?
    Last edited by Clint; 09-22-18 at 09:22.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 11.5" CQB, 9" PDW
    BRT OPTIMUM-S Barrel - 11.5" CQB Suppressor Gas Drive
    BRT OPTIMUM-S Barrel - 11.5" SB Suppressor, 11.5" SBT 25 Deg Tapered Shoulder Suppressor
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC 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. #22
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    Is the weight of the barrel with the gas block?

  3. #23
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    The 11.5" Barrel is 24.5oz with gas block.

    Quote Originally Posted by ffhounddog View Post
    Is the weight of the barrel with the gas block?
    Black River Tactical
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 11.5" CQB, 9" PDW
    BRT OPTIMUM-S Barrel - 11.5" CQB Suppressor Gas Drive
    BRT OPTIMUM-S Barrel - 11.5" SB Suppressor, 11.5" SBT 25 Deg Tapered Shoulder Suppressor
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC 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

  4. #24
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    I just ordered one. Thanks, for the info. Probably should have had you pin it on there.
    Last edited by ffhounddog; 09-14-18 at 14:46.

  5. #25
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    They'll both cycle great with identical EXT gas system configurations.

    The MPR is 3.5 ounces lighter and will handle extremes better due to the material and finish.

    The SPR is thicker at the chamber, however so there shouldn't be much real world concern with cold temps.

    It's hard to go wrong; they're both really great choices.

    Quote Originally Posted by taekwondopreacher View Post
    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.
    ,
    Last edited by Clint; 09-14-18 at 16:46.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 11.5" CQB, 9" PDW
    BRT OPTIMUM-S Barrel - 11.5" CQB Suppressor Gas Drive
    BRT OPTIMUM-S Barrel - 11.5" SB Suppressor, 11.5" SBT 25 Deg Tapered Shoulder Suppressor
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC 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. #26
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    That thing's a monster!

    I bet it suppresses well.

    Quote Originally Posted by markm View Post
    I'd love to spin Pappabear's 338 Titanium sig can on one of the 11.5s.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 11.5" CQB, 9" PDW
    BRT OPTIMUM-S Barrel - 11.5" CQB Suppressor Gas Drive
    BRT OPTIMUM-S Barrel - 11.5" SB Suppressor, 11.5" SBT 25 Deg Tapered Shoulder Suppressor
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC 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. #27
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    Quote Originally Posted by Clint View Post
    They'll both cycle great with identical EXT gas system configurations.

    The MPR is 3.5 ounces lighter and will handle extremes better due to the material and finish.

    The SPR is thicker at the chamber, however so there shouldn't be much real world concern with cold temps.

    It's hard to go wrong; they're both really great choices.

    ,
    My buddy, for whom I built a BRT Optimum 16" gen-1 centered gun, loved it!

    Forged upper and lower, BRT EXT Optimum barrel and MicroPin BRT gas block, ALG rounded top handguard (the exact model escapes me; it was mlok, lol), PWS H2 Buffer, Sprinco Blue action spring, std nitride carrier with Sprinco 5-coil extractor spring, and Precision Armament AFAB 556 (current generation). PA ACSS 3x prism fakeCog on top.

    With full power federal Brown box M193, the first thing my buddy blurted out (in that barely controlled, childlike fashion) was "this damn thing kicks less than my 10/22!!!!" with a fairly dumb grin on his face. Things devolved from there.... including grown men giggling.

    It basically just vibrates in your hand. With .223 pressure AE Ammo it feels like it's short stroking, but ejection is strong @ 3:30-4:00 and it locks back on empty even with no shoulder purchase. Brass collects in a bucket if you don't move.

    No way to get an SR15 experience in a quality package (that will fu&$#%ing run with reliability) for less. I've shot several SR15's (and have a deep love and respect for them that borders on fanboyism). But this is knocking on that door for much less.



    Sent from my iPhone using Tapatalk
    "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. #28
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    Maybe I missed it, but only SBR barrels have 5/8-24 threads?


    Will a 556 SOCOM fit on a 762 SOCOM mount?
    Last edited by scooter22; 09-16-18 at 14:24.

  9. #29
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    Quote Originally Posted by scooter22 View Post
    Will a 556 SOCOM fit on a 762 SOCOM mount?
    I don't believe so. I've read that Surefire designed it so a 7.62 can will fit on a 5.56 mount, but not vice versa.

  10. #30
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    The "default" thread is 5/8-24, except for light barrels with .625 gas blocks and specials like the 14.0" Mid that are designed for a specific set of muzzle devices.

    Quote Originally Posted by scooter22 View Post

    Maybe I missed it, but only SBR barrels have 5/8-24 threads?
    Last edited by Clint; 09-16-18 at 19:20.
    Black River Tactical
    BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 11.5" CQB, 9" PDW
    BRT OPTIMUM-S Barrel - 11.5" CQB Suppressor Gas Drive
    BRT OPTIMUM-S Barrel - 11.5" SB Suppressor, 11.5" SBT 25 Deg Tapered Shoulder Suppressor
    BRT Covert Comps 7.62, 5.56, 6X, 9mm
    BRT MarkBlue Gas Tubes - BRT EXT, EXC 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

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