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.450 bushmaster

The .450 Bushmaster is a rifle cartridge developed by Tim LeGendre of LeMag Firearms, and licensed to Bushmaster Firearms International. The .450 Bushmaster is designed to be used in standard M16s and AR-15s, using modified magazines and upper receiver assemblies.

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Recent contents
  1. Z

    .450 bushmaster upper for sale

      1. For Sale
    • $130
    • Sherwood
    • Oregon
    I have a .450 bushmaster upper for sale. I am cutting down on the number of calibers I need to keep stocked and this one is being sold. It is a BCA upper and has ran just fine for the time I’ve owned it. Probably about 300 rounds through it and it cycles without an issue and I’ve been able to...
  2. kmk1012

    450. Bushmaster Brass

      1. Want to Buy
      2. Want to Trade For
    • Stayton
    • Oregon
    Looking for some 450 Bushmaster brass to develop some loads for a new bolt action upper. Have lots of reloading components or cash to trade.
  3. chickenman

    450BM AR ego Compensator9000

      1. For Sale
      2. For Trade
    • $500
    • Gresham
    • Oregon
    Well cleaning up the safe a little more. not much I can do with all these god damn wrist Surgeries. ANYWAYs Let's move some more things that am bored, have extra, or not going to shoot things i never say AM FRIM, I KNOW WHAT I GOT, CASSSSHHHHHHHH ONLY, other things people say that make you...
  4. KennVFRidr

    Anyone with short barreled .450 Bushmaster experience???

    I read somewhere of reasonable velocity from a Windham Weaponry 9" pistol gas .450 Bushmaster upper...and also watched a video test of a home built 7.5" barreled .450 Bushmaster showing written results of .454 Casull velocities. Wondering if anyone here has any experience with one of these SBR...
  5. KennVFRidr

    Trying to identify .450 Bushmaster upper manufacturer(s)...

    I have an unidentified .450 Bushmaster upper and I'd like to figure out the manufacturer...or at least who made the barrel??? Might've been purchased from Delta Team Tactical in Florida... 16" carbine, Aero Precision XL upper receiver, heavy barrel 1:24 twist, barrel extension to gas block...
  6. Aeromech

    Looking for .450 Bushmaster brass

      1. Want to Buy
    • Salem
    • Oregon
    Looking for some .450 Bushmaster brass any quantity but hoping to score about 50 to 100 , fired is ok. I'm in the Salem area if anyone near has some they want to sell. Thanks!
  7. KennVFRidr

    .450 Bushmaster barrel threads...Educated guess???

    Hi all...I have a Bushmaster upper in... .450 Bushmaster, purchased back in 2017, anyone have an educated guess what the likely barrel thread size might be? I simply don't have the tools available at the moment to pull the flash supressor off to measure. Thanks!
  8. J

    AR15 .450 Bushmaster

      1. For Sale
      2. For Trade
    • $1000
    • Portland
    • Oregon
    Like new .450 Bushmaster AR15 with red dot and CMC single stage trigger. Magpul stock. Comes with case and about 50 rounds of ammunition. Like new, a blast to shoot!
  9. ScottInPDX

    .450BM AR barrel nut shims and crush washers

      1. For Sale
    • $0
    • Tualatin
    • Oregon
    I did a .450 Bushmaster AR build a while ago, and just found some left over little parts. Shims are cut but otherwise unused, package of 11/16" crush washers has four left. Free to anyone who can make use of them. I'd prefer to just mail them to someone over taking time to meet up.
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