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BKF AR15 M4 Carbine Buffer Tube Assembly – Mil Spec

(28 customer reviews)

$39.99 $25.88

200 in stock (can be backordered)


All components are quality Mil-Spec parts for completing your AR15 lower receiver.


  • BKF T6 6061 U-cut Anti-Rotation Mil-Spec buffer tube (6 Position)
  • BKF 3 oz carbine buffer
  • BKF Carbine buffer spring
  • BKF Steel end plate
  • BKF Steel castle nut

Additional information

Weight .5 lbs
Dimensions 10 × 2 × 2 in

28 reviews for BKF AR15 M4 Carbine Buffer Tube Assembly – Mil Spec

  1. Paul Erickson

    Quality parts by Aero. Another flawless transaction with bkingsfirearms

  2. James Heagy (verified owner)

    My order shipped very fast and was packaged well. The product works great. I will use BKF in the future. Thanks.

  3. Erik Sutherly (verified owner)

    Great product

  4. Richard (verified owner)

    Good quality and a great price

  5. Dustin (verified owner)

    Great quality buffer kit, all Aero Precision parts, bought two of these on sale to finish off a couple lowers and they went together perfectly. Would buy again. B Kings is also my new go to for AR builds. Great prices, great shipping times, and veteran owned.

  6. John England (verified owner)

    Good product at a super price.

  7. Chris Kwiatkowski (verified owner)


  8. Keaton (verified owner)

    Awesome product

  9. Matthew M. (verified owner)

    Is it Aero or is it BKF? I can’t tell the difference…….

  10. Andrew (verified owner)

    Have not installed yet but seems nice.

  11. Dustin (verified owner)

    An excellent and inexpensive kit for a build or spare parts.

  12. Joseph G. (verified owner)

    Fit finish and function were perfect! Keep up the good work guys!

  13. Robert Galperson (verified owner)

    Great Price, great quality, fast shipping, great customer service!

  14. Todd R. (verified owner)

    Good solid basic parts at a great price. Will definitely use this vendor again.

  15. Dennis (verified owner)

    Fast shipping and product as described

  16. Anonymous (verified owner)

    Excellent assembly combo at a great price. Fast shipping and great service, too.

  17. Dallas (verified owner)

    I love your company and the way you do business. Will definitely use you in the future

  18. John E. (verified owner)

    Good quality kit for the money.

  19. Travis (verified owner)

    Exactly as advertised

  20. Joshua (verified owner)

    Fit and finish are excellent, shipped super fast.

  21. Michael T. (verified owner)

    Great Parts! No Problems, will buy again for my next Build!

  22. Anonymous (verified owner)

    Great quality. The tube has a nice finish that matches me aero receivers perfectly

  23. Lane T. (verified owner)

    Great buffer assembly, love the light weight.

  24. Anonymous (verified owner)

  25. christopher (verified owner)

    Good to go

  26. Mason M. (verified owner)


  27. Clay D. (verified owner)

    Best price around, most others charged the same or more for just the buffer tube alone. Shipping very reasonable unlike most places these days, and shipped fast. Thank you

  28. sean (verified owner)

    Does what it says on the box. At time of purchase it was the best price online for a 6061 tube complete kit.

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