Bear Creek Arsenal
Oregon Rifleworks
Southwest Firearms
J&B Firearm Sales
HighLine Firearms
Sporting Systems
JavaScript is disabled
Our website requires JavaScript to function properly. For a better experience, please enable JavaScript in your browser settings before proceeding.

  • Join the #1 community for gun owners of the Northwest

    We believe the 2nd Amendment is best defended through grass-roots organization, education, and advocacy centered around individual gun owners. It is our mission to encourage, organize, and support these efforts throughout Oregon, Washington, Idaho, Montana, and Wyoming.

    Free Membership Benefits

    • Fewer banner ads
    • Buy, sell, and trade in our classified section
    • Discuss firearms and all aspects of firearm ownership
    • Join others in organizing against anti-gun legislation
    • Find nearby gun shops, ranges, training, and other resources
    • Discover free outdoor shooting areas
    • Stay up to date on firearm-related events
    • Share photos and video with other members
    • ...and much more!

51t

The Cooper T51 was a Formula One and Formula Two racing car designed by Owen Maddock and built by the Cooper Car Company for the 1959 Formula One season. The T51 earned a significant place in motor racing history when Jack Brabham drove the car to become the first driver to win the World Championship of Drivers with an engine mounted behind them, in 1959. The T51 was raced in several configurations by various entrants until 1963 and in all no less than 38 drivers were entered to drive T51s in Grand Prix races.

View More On Wikipedia.org
Recent contents
  1. D

    AAC 51t suppressor mounts all sold

      1. For Sale
    • $45
    • Wilsonville
    • Oregon
    AAC 51t suppressor mounts - all lightly used. 1. 1/2-28 for a 556 flash $45 spf 2. 5/8-24 for a 308 flash $45 spf 3. 1/2-24 for a 556 brake $sold Price is shipped
  2. moderndave

    AAC 51T 556 brake 1/2x28

      1. For Trade
    • Canby
    • Oregon
    AAC 51T 556 brake 1/2x28 New never mounted. Trades wanted: Keymo Mounts in 556 and 308, 9mm ammo, Glock 17 magazines
  3. sparky8

    PWS MK111 PRO long stroke piston upper w/AAC 51t muzzle brake

      1. For Sale
    • $600
    • Newberg
    • Oregon
    Up for sale is a factory PWS MK111 PRO long stroke piston upper with AAC 51t muzzle brake. These PRO uppers are an amazing value for PWS's long stroke piston system and unfortunately PWS just discontinued this line. Very minor salt on a couple MLOK slots from attachments. Here's what you get -...
  4. dmatzinger

    Advanced armament 51t 1/2x28 suppressor mounts

      1. For Sale
      2. For Trade
    • $100
    • Sherwood
    • Oregon
    I have 2 AAC 51 T suppressor mounts 1/2x28 One is a “blackout flash hider” One is a “breakout compensator” I need a 5/8x24 so ultimate lately looking to trade, one for one. Thanks
  5. bbowl

    AAC 51t blackout brake 5/8x24 / suppressor mount

      1. For Sale
      2. For Trade
    • $80
    • Beaverton
    • Oregon
    .30 cal 5/8x24 Aac 51t blackout. Decided to go with a different can on rifle I bought this for. Only been test fit. Comes with all the shims (unused/unopened) and I’ll throw in a ml of fresh rocksett (Packet included was *rock*hard). $85 shipped or $80 picked up in aloha. trade for 1000...
  6. wfung

    AAC 51T Blastouts

      1. For Sale
    • $120
    • Portland
    • Oregon
    2x AAC 51T Blastout, great condition never rachetted (hold the button down, tighten, then release) $120 each both SOLD
  7. moderndave

    AAC 51t Brake 5.56 New

      1. For Sale
      2. For Trade
    • Canby
    • Oregon
    Looking to trade for a 5.56 KeyMo flash hide
  8. djharteloo

    AAC 51T 1/2x28 flash hider

      1. For Sale
      2. For Trade
    • $50
    • Yacolt
    • Washington
    Came on a rifle, switched out for a flash hider that works with my suppressor. Appears to never had had a suppressor mounted on it. Would like $50 or trade for a 1/2x28 keymo muzzle device or 5.56 ammo. Thanks!
  9. djharteloo

    AAC 51T flash hider suppressor mount 1/2x28

      1. For Sale
      2. For Trade
    • $60
    • Yacolt
    • Washington
    Used to mount my suppressor on an AR for about a year but my 556sd is off getting converted to keymo mounts. Teeth are in probably 95 percent shape and locked up very tight with my suppressor. Asking $60 or trade for a 1/2x28 keymo flash hider (dead air, fcd). Prefer to meet in...
  10. simpleguy

    (2) AAC 51T - Flash Hiders, 5/8X24, 7.62mm p/n 64143

      1. For Sale
      2. For Trade
    • $375
    • HAPPY VALLEY
    • Oregon
    AAC 51T - 5/8X24, 7.62mm p/n 64143 Flash hiders - $375 shipped 1 - Used <50rounds $175 1 - New $200 Shipping Method - USPS priority mail Payment: Paypal F&F, Crypto, Cash, Silver Trades - ONLY AAC 90t, 5/8X24, 7.62mm
  11. Ducati_Meister

    Any idea where I can get a 51T 1/2x28 AAC muzzle device?

    Apparently AAC is still in limbo on so many fronts, I could not order a 51T muzzle device from my LGS. I've been scouring online and everywhere they say the devices are discontinued. Maybe someone here can find a source.
  12. dmmv

    AAC flash hider for 308 - 51T

      1. Want to Buy
      2. Want to Trade For
    • NW Portland
    • Oregon
    Hi all, could use another AAC flash hider or muzzle break for a 300 blk / 308 in 5/8x24. Maybe a 556 as well, but not high priority. Photo for reference. Thanks!
  13. djharteloo

    2 brand new AAC 51T flash hiders

      1. For Sale
      2. For Trade
    • $65
    • Yacolt
    • Washington
    Bought new last year, installed them in rifles, never fired a shot through then. Mounted my suppressor to each one and they fit tight with my 556-sd. Switching everything over to dead air keymo mounts to run my sandman instead. One if the flash hiders has a little green spray paint in it from...
  14. F

    Looking for AAC Blackout 2.0 Advanced Armament Corp 51T

      1. Want to Buy
    • PORTLAND
    • Oregon
    Looking for AAC Blackout 2.0 Advanced Armament Corp 51T . Open to other 51T AAC muzzle devices. 7.62 (30 cal). Thanks, Michael
  15. L

    AAC 51T Blackout flash hider 1/2-28 556

      1. For Sale
    • $250
    • portland
    • Oregon
    AAC 51T Blackout flash hider 1/2-28 556 Never used or mounted. Price firm. FTF in Portland.
  16. H

    BCM BFH 14.5 middy FSP UPPER p/w AAC 51T blackout

      1. For Sale
      2. For Trade
    • $1150
    • Tacoma
    • Washington
    Not into the FSP aesthetic, I know some of you out there are! NOTE: Magpul RVG is GONE! http://imgur.com/a/CNTNpRq About ~1000 rds of brass down the pipe. Well maintained. Rail screws had some salt but they're not stripped out. Pics included of the screws. Muzzle device pinned professionally...
  17. dmatzinger

    AAC 51T mounts

      1. Want to Buy
      2. Want to Trade For
    • Sherwood
    • Oregon
    Looking for AAC flash hinders and muzzle brakes. looking for 1/2x28 and 5/8x24
  18. Roadpirate2322

    AAC miter 51t flash hider

      1. For Sale
    • $50
    • Albany
    • Oregon
    $50 meet in Albany $60 shipped Advanced Armament Co (AAC) Blackout Flash Hider 51-Tooth MITER Suppressor Mount 7.62mm AR-10, LR-308, SCAR-H 5/8"-24 Thread
  19. Slippy

    AAC 51T Muzzle Brake - 5/8x24 threads

      1. For Sale
    • $250
    • Ashland
    • Oregon
    Used, but like new, AAC 51T muzzle brake for sale. This is the .308 caliber, so 5/8x24 threads and good for .300, .308, 7.62, etc. These are rare! AAC was bought out, and these are super hard to find now. Price includes shipping.
  20. BrandonQuixote

    AAC 51T brake and blast diverter

      1. For Sale
    • $80
    • Hillsboro
    • Oregon
    Used, mostly under a can. This is the shallow socket/Shoulder indexing two chamber brake in 1/2x28 $80 The blast diverter is from Simplistic Shootimg Solutions and aren’t available new anymore. They fit any caliber 51T mount and lock in place with a set screw $50
Southwest Firearms Forum
Tigard Pawn 4 More
Bear Creek Arsenal
Copeland Custom Gunworks
Sporting Systems
Cerberus Training Group
Back Top