CAR-15 Buttstock - Aluminum / XM177/ Commando/ AR-15 SP1 Sporter

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This is a reproduction of the Aluminum sliding Buttstock for the XM177, 1970's model Commandos and AR-15 SP1 Sporter. Made in USA

This page is for the bare Buttstock only. If you want the full Assembly with all needed parts click (Here)

Available in two versions:

  • Anodized, Grey in color. Can be used as is.. or you can Coat it yourself with the product of your choice.
  • Coated, Black.



  • The first few collapsing Buttstock examples were handmade prototypes and somewhat complicated in design.
  • This was eventually replaced in 1966 with a much simpler sliding stock design made of aluminum - this is the product you are looking at now.
  • Eventually the above Aluminum stock was replaced by a same shaped version in much lighter polymer (Here)
  • This design was then used up until replacement by the M4 version, which introduced the stock design still used today.



  • 5
    Retro Aluminum Buttstock

    Posted by SteveM on 25th May 2020

    Item took a while to get here, but was worth it. Authentic looking and very close finish to the originals at a third the cost. Highly recommend for a quality retro carbine build.

  • 5

    Posted by Chris on 13th Aug 2019

    Very high quality, clean and even coating. This was the final big part for my car15 build and I couldn’t be happier with this piece. Thanks Retro Rifles, I’ll be recommending you to friends!

  • 4
    CAR-15 Buttstock - Aluminum / XM177/ Commando/ AR-15 SP1 Sporter

    Posted by Drew on 6th Aug 2019

    Very nice item , well worth the wait (a bit longer than expected but it is a small operation deluged with orders) be patient and you will be rewarded!

  • 5
    Anodized Gray

    Posted by John on 30th May 2019

    Solid reproduction. Quality product looks and feels great. Definitely one of the best options out there for a retro build. The Anodized Gray is great and ready to be coated. Definitely recommend it for anyone looking for an old school stock.

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