1911 80% lower frame

tn_sarcoframes (5)

With all the talk about 80% AR lowers, did you know that there are 80% 1911 lowers?Ares Armor sells them, but they are not the only game in town.

Tactical Machining makes a railed 1911 frame. Only a $10 difference between 80% and 100%. The difference is the slide rails, hammer and sear pin holes, as well as the barrel seat still need to be machined to complete the frame.

 

Here is the 80% 1911 frame

1911_80bg

 

 

 

And here is the 100% frame

1911_100bg


Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick has been only been shooting for the past 3 years but found his passion through competitive shooting. USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.


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  • Mack

    any good sites on how to build these? i know there is tons on ARs but i just got done doing a 80% one of those and i now want the challenge of a handgun!

    • facialfirearms

      american gunsmithing institute-they have complete builing and armorers’ videos on most anything that’s out there to build,especially 1911s.

  • Ken

    I wonder how many of these will actually be made into well functioning 1911’s. It’s very critical to get the rails and pin holes precise.

    • Dan

      Probably most will since you have to have a milling machine to do the rails anyway. Anyone who owns that kind of equipment is likely going to be fairly competent.

      • BOB

        but do you really? I’m envisioning a system involving clamps, a dremel with a cut off wheel and a slice of plywood… :D

        • BryanS

          if you did it with a stationary cutoff wheel, a sliding base, and took small passes, that might just work, somewhat like a very cruse horizontal mill. Or similar with a file, like a basic shaper.

      • Bruce

        I’ve got a pretty nice milling machine. But I’m not very competent. I’ll probably start with some plastic lower kits to gain experience, then work my way up to frame rails.

        • facialfirearms

          on most of the sites that i’ve checked they even sell the milling bits and also print placement on the frame.for those that don’t the measurements are imperative and a pice of 4140 or 4130 would be a good piece to play with.you could also even work with some extruded aluminum bar stock in the same dimensional range.the most important thing is to have your work piece completey level with your work table section of your milling machine,and making certain that you zero from the top surface of the piece being worked.i would bet that you’ll get it right on the first or second attempt,cutting frame slots is a very simple milling operation.i would thing that the barrel channel would be most important as it depends on what caliber and/or brand of barrel that you’re using.a good example is that if building a 10 mm auto you need to cut a different barrel channel in the frame than for a .45 acp as the 10 mm needs to have a fully supported chamber because of the higher pressures of the round.good luck,and don’t forget that it’s supposed to be fun,and you’ll be learning valuable lessons on the function of every single tiny part of the firearm.

      • Mart

        If they can do it in Khyber Pass using simple workstations, you can do it at home without a mill, especially since all the hard work’s already done.

        • facialfirearms

          they can do it in the khyber pass because they make precut jigs that the frame sits in only one way.if you’re going to build more than one i’d reccomend making a couple of jigs that align the frame perfectly every time.

      • facialfirearms

        actually you could use a drill press with a sliding work clamp,available cheaply from harbor freight.the vise moves laterally with a hand crank,and as long as it’s perfectly level with a solid drill press platform you can do it that way.

  • alex

    Someone get us some 80% forgings!! Dlask used to offer 60% forged 1911 frames a few years back but they required skill that I did not have lol.

    • facialfirearms

      the second site listed above has 80% forgings.

  • Scott Tuttle

    too bad you have to do those rails. a few holes needing drilled I could handle.

  • gunslinger

    does the 100% needs to be transferred via FFL?

    • BryanS

      A 100 would be a firearm in the eyes of the feds, so yes.

      • gunslinger

        wasn’t sure what parts the fed’s wanted to regulate. 100% ar uppers are just hunks of metal ;-)

        • Phil Hsueh

          That’s true because it’s the lower that the Feds consider to be a firearm. An 80% AR lower is a paperweight, a 100% AR lower is a firearm.

          • BryanS

            Generally the part that holds the fire control group.

          • facialfirearms

            actually the fire control retention is completely irrelevant legally.the only time that fire control comes into play is when building a firearm based upon a foreign manufactured firearm,in which case a certain number of american parts must be used.the legal determination of what constitutes a firearm federally is solely the part which contains the serial number-that’s it,period,no other definition.usually the fire control parts are contained within that particular part,however with some bullpup designs the majority of the fire control parts numerically aren’t contained in the reciever with the serial number.from a manufacturer’s point of view,the major base for the firearm’s construction is what the serial number is placed on.in this case that means that many of the fire control parts are based in it,but unless it’s based on a foreign weaqpon this is completely irrelevant.in the case of a 1911 frame all of the fire control parts are contained in the frame except the firing pin,firing pin return spring,and nothing else.i hope this helps you with the clarity of the legalities.having said that,if you do decide on an 80% frame be certain to have an already functional frame to compare it with and also the needed blueprints which give the placement dimensions.remember that a mistake of .003 of an inch is enough to destroy the frame,or require the welding and redrilling of the holes or functionality will be unusable.good luck with your build.

          • BryanS

            I stand corrected. Bravo :)

            This is why certain sig pistols can have interchanging frames, as the trigger group sub frame bears the serial.

          • facialfirearms

            precisely,and i should have used that example in my above explanation of the laws regarding in state construction and sales.

          • 1911a145acp

            Fed have different nomenclature for “Firearm”/ “Frame” and “receiver”

          • Phil Hsueh

            While that may be true the important thing to consider/know is that the lower receiver is the part that the Feds think of as the gun since it’s the part that gets DROSd whether it’s stripped or complete with parts already installed.

          • facialfirearms

            whether they have different internal nomenclature is irrelevant legally.a 100% frame/lower for an ar/lower for an ak,etc is still legally a firearm,all departmental internal nomenclature notwithstanding.

          • 1911a145acp

            Sorry, you are wrong. A firearm is a complete assembled functional device and an 100% standing alone serialized receiver is not that. A complete 1911 serialized frame IS NOT a handgun. Here is a fun one – Ask your ATF agent if your 80% lower AR, that YOU built, that is now finished and assembled into a fully functional AR, that has NOT crossed state lines, is a firearm? The answer will surprise you.

          • facialfirearms

            i must agree with phil here on this.it’s irrelevant what nomenclature is used by the dept when discussing operational segments.all that matters is what’s legally a firearm and that’s the serialized portion which is legally a firearm,period.try explaining to a fed that it’s only a frame and see how many years they take off your sentence.it’s very simple-serial number = firearm legally and no other interdepartmental nomenclature will change that.as for whether it has crossed state lines,that is irrelevant except as to resale,federally,or depending on the independent laws of the state. it’s still a firearm.the legal catch that you’re trying to explain is backwards from your belief in it,my roomate is a federal attorney and works with the nra ila and this has been a repeated conversation between us and others.the loophole you’re trying to explain is that it can’t be regulated in a state that allows it if you build it,and in some states such as mine you can even transfer it as long as you only build 8 or less firearms a year.if you attempt to sell it across state lines (fully functional or fully machined reciever/frame/etc,whichever has been legally defined as the part that is a firearm and mandated that it contain the serial number) is then a firearm legally.the reason that you can build and transfer within certain states is because those states took a stand against the fed and passed legislation allowing sales within states.the atf can only regulate interstate commerce,or more than 8 firearms per year without having a manufacturer’s license.all other federal laws regarding convicted felons,legally adjudicated sanity questions,and other fed ownership laws also still apply.it’s not not a firearm,it’s jurisdictional.if you build it and move it out of state they will come.

          • 1911a145acp

            I make no argument opposing the fact that receivers and frames are serialized and regulated. There are many different types of arms defined and regulated in a multitude of different ways. What may be illegal to with a receiver or frame is likely illegal with a completed. Receivers ARE NOT firearms according to the DOJ and the ATF. No would would argue that sound suppressors which are serialized, and very tightly regulated in a manner similar to firearms are actually firearms as well.

          • facialfirearms

            again,you have the law ass backwards.take an 80% frame,mill and drill it,and send it to a friend through the mail with no serial number,then write me from your prison library when you can get online and let me know how that worked for you.

          • 1911a145acp

            Works out rather well actually. I ship handguns through the mail all the time. Haven’t had anyone want to send me to prison yet. But obviously you know much more about it.

          • gunslinger

            ship them to FFLs for transfers or to your buddy bob?

          • 1911a145acp

            FFLs all around the U.S.

          • 1911a145acp

            As long as no transfer takes place, as long as no exchange of goods and services take place and as long as it does NOT cross state lines, if you use a commercial carrier that would be perfectly legal as well. Example; I ship my finished 80% gun to my buddy in the same state to demonstrate how to finish it via FedEx and he ships it back. No problem.

          • gunslinger

            a “firearm” has a definition by the ATF. not a rifle, not a pistol/handgun, not a shotgun, short barreled *, any other weapon.. etc.

            firearm is basically a gun that doesn’t fit into any other predefined category. a catch all if you will.

            i guess what happens is because the feds define “1 part” of the gun as what actually constitues the gun. ARs it’s the lower receiver, bolt actions, probably the chamber? etc.

            so when most people talk about “registered” firearm they mean the part of the gun that the fed’s call a “gun” because as facialfirearms said below, take a 80% AR lower, finish it, and send it to your friend, that’s a big no-no. and while yes the reciever isn’t a “firearm” in line with the ATFs definition of “Firearm” it is still an “illegal” transfer

      • 1911a145acp

        Interestingly, The feds do NOT consider a Frame or Receiver a “Firearm”.
        It is however the serial numbered regulated part. It would require an FFL transfer paperwork.

        • facialfirearms

          actually since it’s the part of the firearm with the serial number it is by legal definition a firearm or no form 4473 would need to be filled out,nor would you need an ffl holder to recieve it.

          • 1911a145acp

            Is there an echo in here?

          • facialfirearms

            always when the 2nd is involved.love the moniker,i build custom 1911s.

  • facialfirearms

    it looks like you also need to drill the slide release/saefty plunger holes as well as the ejector holes.