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1/2 scale AR-15

Discussion in 'Rifle Country' started by MachIVshooter, Oct 6, 2014.

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  1. MachIVshooter

    MachIVshooter Member

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    It is not easy to comprehend scales without perspective, and even then, it really helps when you can physically touch the item.

    To better aid in that department:

    (I wear large size gloves)

    IMG_1223_zps6110a30b.jpg

    Yes, my trigger finger extends beyond the front of the magazine well.
     
  2. jerkface11

    jerkface11 Member

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    I think you should try your hand at an A2 stock.
     
  3. MachIVshooter

    MachIVshooter Member

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    That would have been far, far easier than a CAR stock. All the wacky angles and contours and (particularly) broaching the square slot on the bottom. A2 stocks have a nice simple shape and a normal round hole. lol.

    I thought about doing this as an A2, and it's always an option down the road, but the mini M4 just seemed more right to me.
     
  4. barnbwt

    barnbwt member

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    I suppose if there are still Pygmies around, the ATF might have a case for declaring it functionally a short barrel rifle... but by that logic it's functionally a long rifle for 1/2 size folks... so it couldn't be an SBR unless in the hands of a full size person... who would be unable to use the 1/2 size buttstock, although...

    Oh, it's a miniature M4, so it's an SBR no matter how you slice it. Nevermind...one pinned/welded 8+3/4" muzzle brake, please :D

    TCB
     
  5. jerkface11

    jerkface11 Member

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    If he makes a half sized eotech I'm not sure what I'll do.
     
  6. barnbwt

    barnbwt member

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    That's it! Mach, you've got to get an RMR on top of this thing, and make a miniature sheet metal 'housing' to go around it like the EoTech 553's

    TCB
     
  7. MachIVshooter

    MachIVshooter Member

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    That is exactly my plan, although not with a $500 RMR. More like a $60 Sightmark micro that I don't mind butchering.

    Will probably just transplant the guts and lens into a machined housing, since the EOTech clamp is part of the sight body, and I'm dealing with a 7/16" wide 45*x45* mini M1913 Picatinny (As I dubbed it earlier, M956.5 Pica-tiny :D) that no commercially available adapters will fit.
     
  8. barnbwt

    barnbwt member

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    pico-tiny...

    Good idea about the machined housing; I'll bet there's a free CAD model or two floating around of the military reflexes :cool:

    TCB
     
  9. MachIVshooter

    MachIVshooter Member

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    Probably, but I don't have CNC capability, and it's honestly faster & easier to reverse engineer a lot of these things than decipher CAD files. I am not proficient in CAD/CAM. Honestly, I get very frustrated trying to use them and end up with a pencil, protractor, rulers and calculator on the desk, the keyboard and mouse pushed aside :eek:
     
  10. rcmodel

    rcmodel Member in memoriam

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    I Bow to you sir!!!!

    I was a tool & die maker for years in real life, a AMU gunsmith in the Army, and there is no way, no day I could have done what you have done in such a short time.

    Or, even at all?

    rc
     
  11. MachIVshooter

    MachIVshooter Member

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    I appreciate the accolade, though I'm certain with your history this would not have been that difficult for you. Admittedly, the pace has been rapid, and that is one of my problems; I become impatient when I feel that things are moving too slowly. The result is that many of my personal projects are very good, but not perfect.

    I could have taken the time to map out the contours, but I quickly bore of drawing and planning, so a lot of it gets eyeballed. As such, the upper profile is not perfectly round on the sides. I should have drawn out the angles and distances on the FA cuts in the bolt, but once again, it was late, I was tired, and my eyes are pretty good. Except that on the furthest forward two cuts, I misjudged my angle, so they are deeper than the remainder.

    I could produce these kinds of things with zero flaws if I took more time to draw them out, carefully measure and square everything up, put more thought into selecting cutters, take lighter cuts, etc.

    I'm decent at technical drawing, and I'll sit down and do it when something is being made from scratch. But when I am duplicating or scaling a part that I can reverse engineer, my "blueprints" tend to look like this:

    IMG_1225_zps2be300d6.jpg

    I'll have the part, a digital caliper and a calculator sitting there as well, taking measurements as I go, doing math on the fly. Sometimes I make errors, though-especially working on these personal projects into the wee hours.

    Being both fastidious and impatient is a dichotomy of personality traits I've struggled with my entire life, very difficult to reconcile.
     
  12. ClickClickD'oh

    ClickClickD'oh Member

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    From time to time, things on this forum completely blow my mind... hand made flint arrow heads, Damascus knife blades with hypnotizing patterns... and now this. Simply amazing.
     
  13. blueskyjaunte

    blueskyjaunte Member

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    This is awesome. My father was a tool and die maker and as a youngster I spent a lot of time in his shop watching chips fly. I deeply regret that I went on to be a code monkey instead of following in his footsteps.

    Naming suggestion: since this is a micro M4, why not call it a μ4?
     
  14. earlthegoat2

    earlthegoat2 Member

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    Well, it is safe to say at least one member is pulling their weight around here.
     
  15. jerkface11

    jerkface11 Member

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    Yeah he's making the rest of us look like under achievers.
     
  16. jell-dog

    jell-dog Member.

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    ^^^^^^^BIG TIME :what:
    Mach, your build is nothing short of gunsmithing wizardry:evil:
    You have absolutely fantastic skills, a great pleasure to follow the progress:D
     
  17. ghitch75

    ghitch75 Member

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    very nice!!!!!......can't wait to see you shoot it!!!!
     
  18. jobu07

    jobu07 Member

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    Really awesome project. Very creative.
     
  19. downunderhunter

    downunderhunter Member

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    Would make for a good episode of THR Candid Camera at your local range - the look on peoples faces when you rock up, get this out, slap a mag in, charge it and start sending lead downrange would be priceless.
     
  20. jerkface11

    jerkface11 Member

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    Next do a half sized MAS36 in 17hmr.
     
  21. MachIVshooter

    MachIVshooter Member

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    Actually, I was thinking a mini FAL in 5.7x28 :D

    Might just have to do that!
     
  22. Ar180shooter

    Ar180shooter Member

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    That would be amazing to see!
     
  23. Justin

    Justin Moderator Emeritus

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    This thread is easily one of the most interesting and unique things I've seen on the gunterwebs in years.
     
  24. Bobson

    Bobson Member

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    Man, this thread is incredible. PLEASE post a video of it being shot when everything is done.
     
  25. Phaedrus/69

    Phaedrus/69 Member

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    Agreed! We need video! You have some amazing work there.:D
     
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