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My Bushmaster worked as designed !?

Discussion in 'Rifle Country' started by Mags, Apr 7, 2010.


Should I replace my defensive rifle's BCG for reliability reasons?

  1. Yes, get a Bravo Co. BCG

    16 vote(s)
  2. No, keep the Bushmaster BCG

    34 vote(s)
  1. Mags

    Mags Well-Known Member

    Just got a helluva deal on a Bushmaster LE fully accessorized with my preference of furniture and finish. Anyways this gun has all the factory Bushmaster BCG and buffer. I have read Bushmaster BCGs are garbage and was skeptical of the deal I made, and had planned on purchasing a Bravo Co. BCG along with an H buffer. But after everything working so well today should I replace the innards? This rifle as always must be 100 percent reliable. Thanks for the input.
  2. hmphargh

    hmphargh Well-Known Member

    If it ain't broke...
  3. Z-Michigan

    Z-Michigan Well-Known Member

    If it must be 100% reliable, I would get a BCM bolt or even a complete carrier group.

    For most of us who aren't LE (I don't know whether you are), the stock bolt is likely just fine for most uses.
  4. Mags

    Mags Well-Known Member

    I need this to be reliable mostly for training, alot of carbine classes.
  5. Nugilum

    Nugilum Well-Known Member

    ^^ Then get the BCM BCG.
  6. TonyAngel

    TonyAngel Well-Known Member

    Have you shot it enough that you feel that it's reliable?

    If it's working, I really don't see how going with a BCM BCG is going to make it more reliable. There's nothing, that I know of, wrong with Bushmaster equipment. It's good stuff. If you just want a bit of insurance, you could replace the ejector/spring and extractor/spring with "mil spec" parts from BCM. Those are what usually cause a rifle to malfunction. That is, weak springs and extractor/ejector. You might also want to get a couple of extra cam pins, just in case the one you have wears more quickly than it should. You should change those regularly anyway. They're cheap enough. Lastly, check out the gas key and make sure that the screws are properly staked in. Other than those things, I can't see the bolt or carrier themselves failing. I'd think that if they were going to, it would have happened in the first 1K rounds.

    As a side note, I do keep a spare bolt assembly and firing pin, but that's something that everyone should have because any bolt assembly could give you trouble at the worst time and having a complete spare makes fixing the problem less time consuming.
  7. Z-Michigan

    Z-Michigan Well-Known Member

    The bolt itself often fails at some point, either a lug shearing off or the bolt cracking at the cam pin hole. The BCM bolt is advertised as being the correct truly mil-spec steel and being shot peened, both of which help strength and durability. The Bushmaster bolts aren't so advertised and are not believed to be shot peened (per "the chart"). They may or may not be the mil-spec steel.

    Having said all that, I am completely unaware of any known or reputed issues with Bushmaster bolts.
  8. StarDust1

    StarDust1 Well-Known Member

    Dump the stock BCG and replace it with a DD BCG, then have the stock unit properly staked and keep it for a back up(Bushmaster BCG are still batch tested as opposed to magnetic particle tested)BCG!
    DD is the best BCG available for the money, you could also replace the buffer but this is IMO not a big deal. I'd also consider replacing the barrel with a 1:7 twist so you can rely on it with the heavier weight bullets, aside from that I'd also consider replacing the trigger assembly.
  9. rskent

    rskent Well-Known Member

    Just go shoot the thing. If you wanted a Colt, maybe you should have bought a Colt. No, you bought a Bushmaster.
    Don’t waste your money replacing parts that aren’t broken. Start saving for the Colt you should have bought in the first place.

    Having got that off my chest, Bushmaster rifles are not garbage. Bushmaster bolt carrier groups and bolts are not garbage.
    I have put a lot of rounds through my Bushmaster. Many thousands of rounds without a single part failure. I do have to
    admit the firing pin retaining pin is looking a little weak.

    Now, post a picture of your new rifle. Then go shoot the snot out of it.
    Let us know how that carrier group holds up.
  10. jimmyraythomason

    jimmyraythomason Well-Known Member

    Mags,just remember,when someone uses that term to describe a firearm or accessory they are usually just parroting hearsay(usually obtained from the internet). I ALWAYS ignore all "are garbage" accessments especially if they conflict with my own experience.
  11. DMK

    DMK Well-Known Member

    I agree with the poster that said replace the bolt and keep the original for a backup. Test/break in the new bolt thoroughly at the range.
  12. Bartholomew Roberts

    Bartholomew Roberts Moderator Emeritus

    Bushmaster BCG's are not garbage. They are not first rate either; but they are a long way from being made out of egg cartons. I would recommend buying a spare bolt and making sure your bolt carrier group is properly staked.

    A spare bolt is good to have on hand regardless of what brand you buy because it is a quick fix for all of the following problems:

    1. Broken bolt/lugs
    2. Bad gas rings
    3. Worn extractor
    4. Weak extractor springs
    5. Extractor lift
    6. Bound ejector/weak ejector spring
    7. Excessive firing pin protrusion

    When you can address all of those issues in a single, quick swap it saves you diagnostic time and down time when you are training. Besides that, the bolt is a common failure point as you put a lot of rounds through the rifle, so you are planning for the future.

    As far as the H-buffer, it will depend on your gas system. My preference is H-buffer for carbines and carbine buffer for midlengths (unless you are using suppressors, then you need to kick up to an H2 and H respectively).

    FWIW, I've got around 14k rounds on three different Bushmaster BCGs (all improperly staked by the way) and so far, no loose gas keys or broken bolts. I have seen Bushmasters shoot loose their gas key, so it does happen; but staking them properly is a cheap and easy fix. I've also seen broken bolts firsthand; but only two and both DPMS chromed bolts circa 2001.
  13. Z-Michigan

    Z-Michigan Well-Known Member

    How dare you bring personal, first-hand real-world knowledge into this debate! This is the internet! :)

    I have two Bushmasters, far lower round count, no problems with mine either. One has a properly staked carrier key, other does not.

    I don't see anywhere that he's asking about Colt or indicating he wanted one. Colt is not generally considered the best any more, at least not any better than certain other brands that cost less. They thrive based on advertising, fanboys, and a military contract that is based entirely on politics.

    While Daniel Defense is another quality make, where do you get the idea that they are the best for the money? They tend to cost $10-20 more than a BCM group, and the very best reviews I've read are of BCM. Assuming, of course, that there is actually any difference in quality between the two, which there may not be.
  14. kamagong

    kamagong Well-Known Member

    Sage advice.
  15. Mags

    Mags Well-Known Member

    One of my local carbine instructors and rangemaster checked that the Bushy bolt is properly staked and it is, I also checked myself and it looked good. Probably going to replace the BCG with a BCM and keep the BM BCG for spare.
  16. RSVP2RIP

    RSVP2RIP Well-Known Member

    Well a new BCG is a relatively inexpensive thing when you think about it. A spare bolt is even cheaper. I'd keep the bolt carrier and just grab an extra bolt, your choice of makers. Keep it in one of Magpuls grips, along with a spare firing pin and don't ever worry again. Is peace of mind worth $40 or $150?
  17. StarDust1

    StarDust1 Well-Known Member

    Nice try, the DD BCG is the exact same one marketed by BCM...:)
  18. 12131

    12131 Well-Known Member

    Shoot the heck out of it, then see for yourself. If it ain't broke, leave it alone. Wouldn't lose too much sleep over the-best-this-the-crap-that you see so much on the net.
  19. DoubleTapDrew

    DoubleTapDrew Well-Known Member

    So what do you get for the extra $ of the DD one? I can't find anything done incorrectly on my BCM BCG.
  20. dom1104

    dom1104 Well-Known Member

    I have the DD bcg, at the time it was pretty darn cheap I thought.

    I do agree, spart parts for any gun is a good idea.

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