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1911 built from Tactical Machining 80% lower

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  • lanzer
    Member
    • Jun 2014
    • 133

    1911 built from Tactical Machining 80% lower

    Full version here (more pics)

    For two months I’ve been learning everything there is to know about the 1911, and the time had finally came for me to put one together, with an 80% frame.

    First, a bit of financial breakdown on building your own 1911, the cost is actually quite attractive:
    80% frame – $140
    Slide – $120
    Barrel – $140
    Other parts – $300 (don’t want to skimp on some parts such as the slide stop)

    If I can build a gun that rivals a $1800 gun for $680, then that would be fantastic. Although all the gun smithing parts come to more than a thousand dollars already, and let’s not factor in the cost of my CNC mill and lathe… at the end, none of the cost analysis matters because I just want to get my hands greasy.

    Putting together a 1911 is actually very straight forward. The difficulty all lies in getting the parts to fit *just right*.


    First was cutting the slide - It's easy to cut to the right dimensions, but after that comes hours of hand-fitting to get everything just right.

    Second most time consuming part was fitting the barrel. *I thought 90% of the work was fitting the barrel hood, but turns out the lock grooves were not fitting perfectly (of course) and that took more hours to discover and fine tune.



    After that, the rest was a cake walk. *Polishing the hammer and sear were a joy, while smoothing out the trigger is kind of a pain just because how hard it is to reach inside the receiver at times.

    All in all, the experience taught me a lot, and the results were quite rewarding.


    Two guns were built - one with the slide from my RIA 9mm TACT2, and the other is a 45 caliber with a slide from Blackthrone Products.

    Admittedly I messed up on the barrel to slide fit on the 9mm build, so I don't expect great accuracy with that gun, while my second gun, the 45ACP, holds less mistakes and a tight barrel fit.

    Range report - day 1

    I couldn't wait to shoot my 45ACP 1911. *It was late in the day when I finished so I rushed to the indoor range to see what it can do:



    The left are the groups by the 45, right are from the 1911. *These are shot standing, with factory ammo, so I was pretty excited with the promise that the 45 caliber 1911 holds.

    Range report - day 2

    Hand loaded 50 rounds with N320 and Nosler 185gr bullets. Though it was raining, the range was still open, so I went and did some bench shooting.



    The big disappointment today was that all my hand load sucked. *The recommended load on the Nosler website didn't work for me at all! *I thought the day was over, but then I remembered the good results I have with the Magtech factory ammo...

    On a bench with a 6x scope, I could get groups as tight as 0.7". *That's a relief!

    The 9mm cycles perfectly (probably because the barrel is ramped) but the 45ACP would jam 10% of the time, but that can be troubleshot and fixed. *Hoping that one day I'll get even better results with hand loads!
    Last edited by lanzer; 12-04-2014, 2:44 PM.
    Trigger jobs, range reports & other mods - https://lanzerbot.wordpress.com/
  • #2
    bksa
    Senior Member
    • Dec 2011
    • 2012

    that kurt is way too big for a X2

    why did you you need to ream the barrel?

    Comment

    • #3
      ar15barrels
      I need a LIFE!!
      • Jan 2006
      • 57078

      Originally posted by bksa
      why did you you need to ream the barrel?
      A "gunsmith fit" 1911 barrel will be oversized in the hood length, hood width, standing lug height and shallow in the chamber depth.
      You start by making the barrel fit into the slide.
      Then you can chamber the barrel to the correct headspace depth.
      Then you can fit the standing lugs to the frame and slide setup.
      Randall Rausch

      AR work: www.ar15barrels.com
      Bolt actions: www.700barrels.com
      Foreign Semi Autos: www.akbarrels.com
      Barrel, sight and trigger work on most pistols and shotguns.
      Most work performed while-you-wait.

      Comment

      • #4
        bksa
        Senior Member
        • Dec 2011
        • 2012

        i see, thanks Randall

        Comment

        • #5
          edgerly779
          CGN/CGSSA Contributor
          CGN Contributor
          • Aug 2009
          • 19871

          I still have to drill the fcg holes. I milled the slide rails as a tight fit so I can sit in front of tv and lap in. Everything I milled is an interference fit so I can lap in including barrel channel. To me it is relaxing making parts fit properly. Momma says it is occupational therapy for a moron. Oh well. Mine is a tm as well. Very nice to mill good alloys in that frame no spalling or chip removal problems.
          Last edited by edgerly779; 12-03-2014, 3:31 PM.

          Comment

          • #6
            kcstott
            I need a LIFE!!
            • Nov 2011
            • 11796

            And it's not a lower it's a FRAME.

            Comment

            • #7
              Escobar
              Banned
              • Dec 2013
              • 544

              Doesn't the frame have a lower in it?

              ; )

              Comment

              • #8
                umd
                Senior Member
                • Aug 2013
                • 1703

                nice

                Comment

                • #9
                  kcstott
                  I need a LIFE!!
                  • Nov 2011
                  • 11796

                  Originally posted by Escobar
                  Doesn't the frame have a lower in it?

                  ; )
                  Nope

                  The frame has a Hosted Jpeg of a frame, a fixture, and fixture and a machine, and two pistols, But no lower to be had

                  Comment

                  • #10
                    lanzer
                    Member
                    • Jun 2014
                    • 133

                    Originally posted by bksa
                    that kurt is way too big for a X2

                    why did you you need to ream the barrel?
                    I see a real milling machine in the future, so I bought a used Kurt for cheap A precise and heavy vise is so useful, outside of milling I use it all the time.

                    My chamber reamer doesn't handle the throat, and I wanted a throating reamer to adjust the throat on my other pistols also. When I make ammo I don't have to keep worrying about different OAL.
                    Trigger jobs, range reports & other mods - https://lanzerbot.wordpress.com/

                    Comment

                    • #11
                      lanzer
                      Member
                      • Jun 2014
                      • 133

                      Originally posted by kcstott
                      And it's not a lower it's a FRAME.
                      Corrected, thanks. A noob gotta learn.
                      Trigger jobs, range reports & other mods - https://lanzerbot.wordpress.com/

                      Comment

                      • #12
                        RamonSJC
                        CGN/CGSSA Contributor
                        • Aug 2012
                        • 1532

                        Very, very clean!
                        Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
                        ~Albert Einstein

                        "If a law is unjust, a man is not only right to disobey it, he is obligated to do so."
                        ~Thomas Jefferson

                        All I have in this world is my ball$ and my word, and I don't break them for no one.
                        ~Scarface

                        Comment

                        • #13
                          spyde12
                          Senior Member
                          • Jun 2014
                          • 1647

                          Good job man!

                          Sent from my SPH-L710 using Tapatalk

                          Comment

                          • #14
                            SonofWWIIDI
                            I need a LIFE!!
                            • Nov 2011
                            • 21583

                            Nice!

                            And honestly, the frame is the lower half of the gun.
                            Sorry, not sorry.
                            🎺

                            Dear autocorrect, I'm really getting tired of your shirt!

                            Comment

                            • #15
                              kcstott
                              I need a LIFE!!
                              • Nov 2011
                              • 11796

                              Originally posted by SonofWWIIDI
                              Nice!

                              And honestly, the frame is the lower half of the gun.
                              Ok say that around a bunch of AK guys and see if you don't get belittled to the point of being ashamed of yourself for even living.

                              Yeah it is the lower part of the weapon but that would be using the word as an Adjective the OP was using it as a Noun



                              And if you've read any of my posts you we'll see that I'm no master of the English language and a prime example of a public funded education.
                              It also brings up the term to "change something out"
                              That is a pet peeve of mine. You can not have two verbs like that in a sentence.
                              Last edited by kcstott; 12-05-2014, 8:54 AM.

                              Comment

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