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Thread: TM 80% build

  1. #1
    Gunco Regular Shooter17's Avatar
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    Default TM 80% build

    The lower was completed with my Atlas drill press and Atlas lathe milling attachment.
    The TM jig was handy to hold the receiver and to drill the FCG pins, didn't use the top plates except for the trigger hole.
    For the FCG pocket I used measurements and did layout on the receiver as shown in a sticky posted on Weapons Guild.

    Been looking on line for a HBAR 16" 1-9 twist chrome lined mid length upper for a while without much luck,
    everyone seemed to be sold out.
    But, went to a Gun show yesterday and found a decent deal on a complete upper with bolt, carrier and also a Bushmaster lower parts kit.
    Total cost, not counting the jig was right at $600.
    Build time was around 4 hrs,.....been awhile since I've messed with the AR platform

    According to the foundry stamp...The upper is.....box= BrassAluma Forge (mainly for Colt)
    Gonna wait to finish the lower till I put some rounds through it next weekend.


    Shooter
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  2. #2
    Scheiße. Mr_Posthumous's Avatar
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    Looks good. Ive been wanting to attempt this, i only have a drill press and a dremel though. Not sure if i have the skill with the DP to do it!

  3. #3
    Gunco Regular Shooter17's Avatar
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    I was a little nervous about doing one myself, but it went pretty smooth.
    They can be done without the jig
    with a decent drill press, just gotta take your time.
    Along with the drill press, you will need a 5/32", 1/2", 3/8" drill bits and a 3/8" aluminum burr bit or milling bit, a vise and caliper.
    There are several good threads, PDF files available showing layout measurements, how to make a FCG pin template and the step by step process.

    Shooter

  4. #4
    Scheiße. Mr_Posthumous's Avatar
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    Thanks Shooter, Where did you get your 80% from? Tactical Machining? Ive seen a few places that sell 80% receivers. been looking! Going to have to find one and hit up my local harbor freight i guess, since you've talked me into it.

  5. #5
    Gunco Regular Shooter17's Avatar
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    Yes it is a TM 80% lower.
    Mine was the older version that had the pre drilled selector hole.
    The fit and dimension accuracy of the TM lowers matches or exceeds some of the big name AR manufactures.

    Let me know if you need any build info links.

    Shooter

  6. #6
    Gunco Addicted for life j427x's Avatar
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    i may start making my own lowers from some of these 80% jobs again.

    they look ideal to do that retro no fence A! replica i keep dreaming about--LOL

  7. #7
    GuncoHolic Sprat's Avatar
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    Quote Originally Posted by Mr_Posthumous View Post
    Looks good. Ive been wanting to attempt this, i only have a drill press and a dremel though. Not sure if i have the skill with the DP to do it!
    very easy with a drill press, hand files and dremel, there are few tutorials on the web dutigaf has one on WG,( it may be posted on here if you look in the old threads he did last year. I did a 0% DSA forged lower with drill press, hand drill dremel and hand files, very easy to do helps to have micrometer and a 100% recieveror blueprint (which are free on the net) or a old tannery casting as they were opened up in the fcg area

    you don't need jigs or templetes, just the blueprints and the time, then for anodizing there are a million tutorials on that

    set your mind to it you can do it, these TM 80% are a piece of cake once you have done one you could do ten

    sprat
    Sprat and sprat1 are one and the same.

  8. #8
    Citizen, Patriot, Ranger bellson's Avatar
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    Quote Originally Posted by Sprat1 View Post
    very easy with a drill press, hand files and dremel, there are few tutorials on the web dutigaf has one on WG,( it may be posted on here if you look in the old threads he did last year. I did a 0% DSA forged lower with drill press, hand drill dremel and hand files, very easy to do helps to have micrometer and a 100% recieveror blueprint (which are free on the net) or a old tannery casting as they were opened up in the fcg area

    you don't need jigs or templetes, just the blueprints and the time, then for anodizing there are a million tutorials on that

    set your mind to it you can do it, these TM 80% are a piece of cake once you have done one you could do ten

    sprat
    Hi Sprat,

    Can you point me to one or two of those anodizing tutorials? I am have issues...
    Imagine whirled peas

    Peace, Love, And Superior Firepower






    Bellson

  9. #9
    3/6 Infantry mtdew's Avatar
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    I went to the website, very interesting. Might have to give it a try. Here's the link- 80% AR-15 Lower Receiver
    "NA BEAN DON CHAT GUN LAMHAINN"
    Clan MacPherson
    "CREAG DHUBH"!

  10. #10
    3/6 Infantry mtdew's Avatar
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    What type of finish would be best?
    "NA BEAN DON CHAT GUN LAMHAINN"
    Clan MacPherson
    "CREAG DHUBH"!

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