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Mil-spec AR-15 Buffer Tube Assembly



The AR-15 Mil-Spec Buffer Tube Assembly is made out of durable 6061-T aluminum, making this product very lightweight. The 3-ounce buffer and carbine coated spring ensure a smooth and reliable operation. The mil-spec six position receiver extension allows this kit to be compatible with various aftermarket stocks for simple customization. This kit includes the following: end plate, castle nut, buffer tube, carbine spring, and 3-ounce buffer.

Additional Features: 

  • Mil-spec dimensions
  • Six-position buffer tube for maximum adjustability of butt stock length
  • Accepts all standard-sized AR type butt stocks

WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov

Made in the USA Lifetime Warranty

Shipping Restrictions

AR-15Lowerreceivers.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally. 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 (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. We try our best to keep our shipping page current, but laws change daily.

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.