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Thread: FTF's possible buffer spring issue?

  1. #11
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    I have broke corners with a small flat Jeweller's File and then polished the area with a Dremel and a Felt Bob using JB Bore Paste.

    In fact, I do it as a matter of routine on a new barrel install for insurance. Cleaning the stray JB out of the barrel extension is the biggest hassle.

    It can be done with the barrel in the reciever but it is easier to do with it out of the upper.

    It is hard to over-do-it with such limited tools.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  2. #12
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    Quote Originally Posted by Bucks13 View Post
    I may have this problem you speak of...is it ok to take a file to the lugs and round them out a bit? Would I need to worry about premature wear/failure/rust if I do file them?
    Thanks for your help ahead of time.
    It will not cause any wear issues. In fact, as far as rust goes, I have even polished the entire feed ramps at the same time. If you are lubing your rifle anywhere near enough, this area will stay so wet rust is a non-issue. If your polished ramps are rusting you are doing somethign seriously foobar with your bolt lubing.
    Last edited by Heavy Metal; 01-04-10 at 23:16.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  3. #13
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    Quote Originally Posted by Heavy Metal View Post
    I have broke corners with a small flat Jeweller's File and then polished the area with a Dremel and a Felt Bob using JB Bore Paste.

    In fact, I do it as a matter of routine on a new barrel install for insurance. Cleaning the stray JB out of the barrel extension is the biggest hassle.

    It can be done with the barrel in the reciever but it is easier to do with it out of the upper.

    It is hard to over-do-it with such limited tools.
    I can see using a small jewelers file.

    But on the other hand, I can just imagine someone going to town on their new barrels feed ramps with a rat tail file! LOL.....

    ETA: Remember the DIY Dremel fluted barrel?
    Last edited by Quib; 01-04-10 at 23:29.
    “A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves.” -Lao Tzu


    http://quibphotography.com/

  4. #14
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    ETA: Remember the DIY Dremel fluted barrel?
    Just because someone can do something does not mean they should do it.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  5. #15
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    thanks for the replies guys. i think i'll go ahead and give it a go.

    oh, and i should have clarified....i didn't actually mean i would use a file, i was planning on using a 220 grit filing stone i got from my die maintenance guys at work. thin, flat, hard so it won't flex and very fine.

    do you think compressed air and some CLP will be enough to get the dust out of the barrel extension when i'm done?

  6. #16
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    Remember, you are trying to break the corners on the bottom two cut-outs on the star-shaped hole in the extension, not the ramp itself but the clearace cut for the two lugs at the top edge of the feed ramps. It will have to be considerably thinner than a bolt lug to work. You are trying to give it an angle. A Jewelers file is very thin and flexes a bit. It is ideal for this. You can even get diamond dust Jewelers files that work work even better. Harbor Frieght sells both.

    The cut out is shaped like a boxy 'U'. I try and break the edges on all three sides.

    As to any debris, I would hose it with brake-cleaner and flush it out the muzzle and throughly re-lube.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  7. #17
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    Quote Originally Posted by Heavy Metal View Post
    Remember, you are trying to break the corners on the bottom two cut-outs on the star-shaped hole in the extension, not the ramp itself but the clearace cut for the two lugs at the top edge of the feed ramps. It will have to be considerably thinner than a bolt lug to work. You are trying to give it an angle. A Jewelers file is very thin and flexes a bit. It is ideal for this. You can even get diamond dust Jewelers files that work work even better. Harbor Frieght sells both.

    The cut out is shaped like a boxy 'U'. I try and break the edges on all three sides.

    As to any debris, I would hose it with brake-cleaner and flush it out the muzzle and throughly re-lube.
    Thanks. I know exactly where you're talking about, so I should be good to go. And the stone I have is 1.67 mm thick and just under 13 mm wide, so I'll be able to do some detailed work.

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