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Mil-spec AR-15 Butt Stock

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The original M4-type buttstock.

Aftermarket stocks are awesome, but some builders prefer the good ole' mil-spec stuff. This M4 six-position buttstock perfectly replicates the stock found on service-issued rifles.

It's made from the same injection-molded polymer and sports a six-position-adjustable latch for dialing in length of pull.

M4 Stock: Mil-Spec Fitment (1.148" OD)

This "M4" AR-15 stock is designed to fit most AR buffer tubes. Common tubes feature a mil-spec outer diameter of 1.148". Need a mil-spec tube to finish your 80% lower or stripped lower receiver? Grab one here.



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Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.


We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.