M4 Upper Receiver

M4 Billet Upper Receiver
Dimensional correct, taken from Colt M4 Upper Receiver.
Models are tested and proven, ready for CNC.
Models also available in STEP/IGS file format as well as original SolidWorks Source Files.


  • Brandon Gerke

    Would it be possible to get the solid works file?

  • Brandon Gerke

    Would also be possible to get the STEP File as well for both the upper and lower? This is a great design.

    • http://www.youtube.com/SSIDesigner Nathan F.

      Brandon: e-mail sent.

  • alessandro d s

    hi nathan please contact me by email I would like to know how can I find the files of the Upper Receiver

    I apologize for the trouble

  • Juan C

    Could you email me the STEP file, Thanks.

  • chris battelene

    How do we get a solid model?

  • pudlian

    Thank you for sharing your work!
    Have you any plans on doing a heavy wall slick side upper for either the -10 or the -15?

    • http://www.youtube.com/SSIDesigner Nathan F.

      Pudlian: Yes I have made it in the past, will make some changes to it and make it public in the future.

  • Jeffrey Barker

    Thanks for Sharing your work!!!! Is there anyway you could email me a copy of the STEP/IGS file?

    • http://www.youtube.com/SSIDesigner Nathan F.

      Jeffrey: e-mail sent.

  • Asgard

    Really like this design 🙂 would it be possible to get the SLDPRT files for this? Thank you!

  • joe fabetes

    new to the forum and was wondering if it would be possible to get the SLDPRT files for

    M4 Upper Receiver. thanks joe

  • Ludwig Moser

    Hey Nathan, awesome work on those models. Is it possibe to get a an Upper And Lower in a Solid works file, Thanks.

  • Greg Allen

    Hey Nathan, great models, was wondering if i could get the STEP/IGS file format for these models?
    Thanks, David

  • Thefixer Ishere

    Hi Nathan, you’ve done some really good work here my friend, can you please forward the step/igs file format for these models to me also, thebpfixer@gmail.com greatly apprecaited

  • John Stewart

    Hello Nathan, thank you for all your great work on these files, can you please forward the step and igs files for the upper and lower. Thanks, John

    • http://www.youtube.com/SSIDesigner Nathan F.

      John: e-mail sent.

  • ANdrea

    Hi Nathan. Nice job. Could you send me step model? thanks in advice. A.

    • http://www.youtube.com/SSIDesigner Nathan F.

      Andrea: e-mail sent.

  • JOCK TRUE

    Hello Nathan, thank you for all your great work on these files, can you please forward the step and igs files for the upper and lower and Solid works file. Thanks…