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Thread: Unfinished Fal Receiver

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    Gunco Veteran pjm204's Avatar
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    Default Unfinished Fal Receiver

    Anyone know how hard it would be to finish one of the century castings, not sure if they are 50% or 80%. Any ideas?

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    GuncoHolic Sprat's Avatar
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    They sold 40% and 70% both FAC and century had them when they were separate companys a few years back

    I have got two 70% sitting here ready to go, I am doing mine by hand. I was going to do this with others, but I have lost touch with them

    if done without a milling machines I will have to use taps, I got quotes the other day its over $100.00 for the taps but I will use them twice! all the interior cuts will be done with a mounted dremel and /or drill press, hand files, I am in no hurry
    the front end is the problem, the thread timing by hand will be fun, but with shoulders I should do ok.
    heat treatment I have given this a lot of thought and read every thread out there, this has been done before so I can do it. only I am going to use a blacksmith to do the heat treatment by temp/color

    I have downloaded all past posts on doing these 70% and I will be working from these threads were posted by others. Roderus has several posts/threads going way back in the archives on these builds. got to do the research

    since you asked for thoughts


    sprat

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    Gunco Veteran pjm204's Avatar
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    thanks, I just saw a couple on gunbroker and thought I might give it a try but I think it might be biting off more than I can chew with the limited amount of info available

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    Gunco Member Racerex1's Avatar
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    I have 3 of them. I spent about 80 hours on 2 of them on the Bridgeport. This was around 2001. Then Sarco came out with $179 Imbel, ( back in the day!) I bought 2 and got consecutive serial numbers. Havn't looked at the castings since. One has been surface ground flat and the other 2 are really 80% receivers. Lost interest.

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    GuncoHolic Sprat's Avatar
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    Well I started the 80%, I filed down(by hand) the bolt rails measured from the top rail, I reformed the area above the mag well back behind the carry handle area and the bolt face meet with a dremel stone.
    for cutting of the interior rails,dremel cut off wheels will be used, a
    individual wheel for the top cover and three glued together to form the thickness of the bolt rails. I have evened the face of the receiver it was off a bit.

    sprat
    the chamber threads will be done by hand I ordered the taps for the gas plug and barrelled chamber. The gas plug area needs to be openned I will do this with a series of regular drill bits using the barrel stub for guidiance as the openning is stepped inside. I am not cutting a carry handle slot. the barrel/chamber area needs to be openned up I am going to use a brake wheel cylinder stone reamer since I don't have a lathe ( don't need one) the back chamber near the mag well has to be formed by file as the the barrel stub as a guide. Cutting the threads well I figured I would destory a barrel stub by cutting it, starting at the carry handle slot through the chamber than file and sand to form. the front of the stub will form my threading guide! I will hold/support it up against the 80% front by receiver wrench and a bolt/nut/washer through the gas plug and vice/verse for cutting the chamber threads
    I am doing the charging handle cuts and ejector block last.

    the taps come from mcMasters-Carr

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    GuncoHolic Sprat's Avatar
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    Finished to fire function see the new post above

    sprat

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    Question Everything... CeeKay's Avatar
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    If you've got a milling machine and some good tooling, it's not too terribly difficult... It won't be easy, and I believe you have to heat treat the entire thing.

    Also, see the post by Sprat... More importantly, see what the FAL Files has to say about Sprat...


    - CK

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    Damn contrarian mauser1959's Avatar
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    Just as an aside , who cares what a differnt board says about a member. I am sure that there are some at the basement that would not have kind words for many of us over here. Until I am proven wrong , I would as soon take a man at his word ; though to borrow a phrase from R Reagan , trust but verify.
    MOLON LABE !!!!!

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    Everyone NEEDS a Glock! glock's Avatar
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    if i recall ppl on fal files said stay away from century castings because they were dangerous..

    but what do i know i've only built 3 fals and fired over 8000 rounds of 7.62x51
    If any punk kid ever comes up to you asking for your `Gang Sign` Tap your chest twice then your forehead once. After doing that only upon a threat do you draw your glock and show him what you meant.




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  10. #10
    Question Everything... CeeKay's Avatar
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    Glock: Could you be thinking of the Aluminum receivers made a few years ago? I believe they were Century's bright idea, though I could be wrong...

    They were made from Aluminum and would very easily stretch and deform under the pressures of a .308 round, and thusly they were named the "Aluma-BOMB" receivers, and word went out to avoid at all costs.

    Also, Entreprise is one to stay away from, unless you've got good experience with FAL receivers... Entreprise receivers almost always require refitting on damn near every mating surface to get everything to sit right...

    And Glock: You have experience with FALs... Could you honestly build one without the aid of a milling machine?

    Mauser:
    FAL Files has members who build FALs for a living... I'll take their advice over Sprat's any day.

    Honestly, it will be incredibly difficult if not totally impossible to finish out an 80% with nothing but hand tools. The FAL's receiver is very precise machining. A dremel and a screwdriver just isn't enough...


    - CK

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