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Thread: Super lightweight upper--how do I get there from here?

  1. #11
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    Quote Originally Posted by Greg Bell View Post
    But I am thinking of a mix of lightweight and idiot proof. I don't want sights that screw or are levered on. The A1 carry handle and FSB would seem to give you the most durable sight arrangement--and pretty lightweight too.
    I went down a similar road 5 years ago. I bought two Colt 6520s with the intention of going opposite directions with them. On one I shaved down the FSB, installed an M4 upper, put a 10.0 rail over the barrel, and added other parts and pieces.

    With the other my intention was to do irons only, I was going to swap out the A2 for a slab-side A1, etc. My thinking was that I wanted a gun that was lightweight and simple so that I didn't have a lot of money tied up in it, for a variety of reasons. Chief among these was as a "loaner" carbine. The problem was it never got loaned and the stripped-down nature meant I never really shot it either. I wound up selling it and putting together a BCM upper and lower. Now if I want to loan it out in basic form I lock the Troy rear in the up position, remove the Aimpoint, and hand them the gun.

    I'd like to know if the Fulton, or the Nodak, slab-side A1 uppers have M4 feedramps, and I agree with Mark that I'd REALLY like to see a true A3 slab-side without resorting to the increased wall thickness of the DPMS part. What I'd like to see is:
    1. flat top
    2. 4 feedramps
    3. dust cover
    4. no brass deflector
    5. no forward assist
    6. standard wall thickness


    Greg, I like where you're headed with this, I just found that my similar rifle got zero use and now look for ways to make rifles work for my regular use AND double for alternate uses. In your case, combining light weight with simplicity, I'd go with...

    1. Fulton or Nodak slab-side A1
    2. Daniel Defense 14.5" lightweight barrel
    3. standard FSB
    4. XS-CSAT rear aperture sight
    5. phantom flash hider silver-soldered in place
    6. standard CAR handguards (or M4 with only one shield)
    7. MOE grip with gapper
    8. M4 stock


    If you want to add a light I would put an MI FSB mount on it, even though it's heavier (you can also grind down the off side). I find the standard 7.0 (CAR, M4) handguards to be too short to attach a light. The X200/300 works out great on the FSB mount.

    The other challenge you're going to encounter is sling attachment with the thin profile barrels. Colt did make a .625" side-sling and I had one but stupidly sold it on the 6520 I got rid of (and the buyer had no idea what it was). If assembling the lower from scratch I'd take the time and cost to add the Noveske receiver endplate QD attachment point. It's a $25 part and it's easier to install in the beginning and better to have it and not need it IMHO. I'm using them on all my carbines from now on.

  2. #12
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    Rob, The NDS's do not have ramps. Although costly, one could cut them in and have it reanodized.
    I did email NDS to ask them about the upper in question, although I asked about the shell deflector.

    Mark
    GET IN YOUR BUBBLE!

  3. #13
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    Kind of veering off track I suppose, but there's another thread re: uppers with no FA, and I wound up ordering a Les Baer today.
    http://m4carbine.net/showthread.php?t=49182

  4. #14
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    http://www.lesbaer.com/223parts.html

    Part way down--guess I should've read your last post!
    GET IN YOUR BUBBLE!

  5. #15
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    I built this gun to be as light as practical. I used a Bushmaster superlight barrel (chrome lined, 1/7 twist) and a Carbon-15 Upper and a Cav Arms Lower. The result is an airy 5 lb. 1 oz.


  6. #16
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    Now that looks light!
    If you aren't armed when you take a dump in your own home then your opinion on what is a practical daily carry weapon isn't interesting to me.

  7. #17
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    I assume you meant to ask Greg that.
    You're right. I did.
    Last edited by patrolman; 03-15-10 at 20:15.

  8. #18
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    I don't see much use for it, and it adds a little weight. OTOH, if it requires that I use an upper without M4 feedramps it isn't worth it.
    If you aren't armed when you take a dump in your own home then your opinion on what is a practical daily carry weapon isn't interesting to me.

  9. #19
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    Gotcha.

  10. #20
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    Quote Originally Posted by rob_s View Post
    Kind of veering off track I suppose, but there's another thread re: uppers with no FA, and I wound up ordering a Les Baer today.
    http://m4carbine.net/showthread.php?t=49182
    Rob, Didn't notice, do the LB's have M4 ramps?

    Mark
    GET IN YOUR BUBBLE!

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