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.