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BKF AR15 Enhanced Lower Build Kit (No Stock)

(49 customer reviews)


92 in stock


This product is 100% made in the USA! All components are phosphate or Nitride coated and include quality Mil-Spec parts for completing your AR15 lower receiver. Pair with our buffer tube assemblies for a smooth hassle free build.


  • Fire Control Group (Trigger, Hammer, Disconnector)
  • Billet Magazine release Button – Basketweave
  • Mil-Spec spring kit
    • Hammer Spring
    • Trigger Spring
    • Disconnector Spring
    • Pivot Pin Spring
    • Takedown Pin Spring
    • Buffer Retainer Spring
    • Selector Spring
    • Bolt Catch Spring
    • Magazine Catch Spring
  • Mil-Spec Selector
  • Mil-Spec Bolt Catch
  • Mil-Spec Mag Catch Latch – Nitride
  • Mil-Spec Small Parts Kit
    • Takedown Pin – Nitride
    • Takedown Pin Detent
    • Pivot Pin- Nitride
    • Pivot Pin Detent
    • Trigger Pin- Nitride
    • Hammer Pin- Nitride
    • Selector Pin
    • Bolt Catch Roll Pin
    • Bolt Catch Plunger
    • Buffer Retainer
  • Mil-Spec Grip Kit
    • A2 Grip
    • Hex-head screw
    • Lock washer
  • Mil-Spec Metal Trigger Guard Kit
    • Trigger Guard
    • Trigger Guard Roll Pin

BKF Mil-Spec AR15 or LR308 (DPMS) Anti-Rotation Carbine Length Buffer Tube:


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

Additional information

Weight 1 lbs
Dimensions 8 × 4 × 4 in

49 reviews for BKF AR15 Enhanced Lower Build Kit (No Stock)

  1. Daniel J. (verified owner)

    Fit and function were great on my Anderson lower. Fast shipping as well.

  2. Michael R. (verified owner)

    Great value & fitment. Trigger is very smooth.

  3. Brian (verified owner)

    I rated a 3 could’ve easily been a 5. The price and shipping time was good. The product was good quality but…when the package arrived the LPK was crammed into a small bag that had been torn by one of the sharpe edges. So I had springs and detents floating around in the package. I was able to locate them all but could’ve been a real downer.
    All that said the parts are assembled and work as promised.

  4. Anonymous (verified owner)


  5. Joseph F. (verified owner)

    Excellent service and great turn around on shipping. Couldn’t have asked for a better transaction

  6. Donnie Wagner (verified owner)

    Another kit

  7. Norberto S. (verified owner)

    Great company with great products at a good price.

  8. Slade C. (verified owner)

    Great product and fast shipping.

  9. Darren B. (verified owner)

  10. Chris T. (verified owner)


  11. Anonymous (verified owner)

    Fit and finish was good, however had to re-install and dry fire the trigger multiple times so it would consistently re-set. It seems to be fine now, have to take it to the range to confirm.

  12. tomasz (verified owner)

    Good product , quick delivery

  13. Anonymous (verified owner)

    For the money this was a nice set. Everything fit correctly like it should, I would purchase again.

  14. nramoore (verified owner)

    Received this today. Appears to be a good kit. Good service by BKF and well packaged.

  15. Jeff Allen (verified owner)

    I ordered 4 enhanced lower build kits, they seem to be good parts but was missing the trigger guard roll pins in all kits and the grip screw in one kit. Was a hassle to find!

  16. pawel k. (verified owner)

    Felt like it shipped the next day and came in really fast. Super service.

  17. Juan (verified owner)

    Very good

  18. Nikoli (verified owner)

    Quality product at the best price around. 10/10 would buy again

  19. Michael P. (verified owner)

  20. Stephen (verified owner)

    Went together like it should

  21. David Dantzler (verified owner)

    This is the best deal going for all of the parts you need to finish out a lower.

  22. Maurice B. (verified owner)

  23. William (verified owner)

  24. Isaac (verified owner)

    Overall a great LBK. The trigger is much smoother and has a cleaner break than my PSA brand “mil spec” trigger. It also has less take-up before the break. My only complaint is the safety selector switch is a little gritty and the detente has weak engagement. I’ve carefully inspected the spring, detente, switch, and receiver and can’t figure out why. I’ve cleaned and lubed the selector and it has improved, but still not quite to my liking, maybe it needs to break in. That’s the only reason I gave this 4/5 stars instead of 5. Otherwise, for the price I think this is a fantastic kit. I will be buying several more in the future and I have recommended this kit to friends.

  25. durand henderson (verified owner)

    Packaged well. Good quality.Fast shipping

  26. Shawn W. (verified owner)

    Was everything I needed for my build. Price was good shipping was fast and somewhat reasonable price. Don’t mind paying a little extra for shipping when they get it out the door fast.

  27. Todd (verified owner)

    As always good value

  28. Steven W. (verified owner)

    Always excellent quality abd fast shipping. Used these kits on PSA,Anderson, & Aero. Not a single issue.

  29. Glenford (verified owner)

    Great service, parts fit perfect

  30. Steve B. (verified owner)

    Very good mil spec kit. One if the best triggers I have used on mil spec builds.

  31. Nathen T. (verified owner)

    Well assembled kit. Nothing fancy, but it works and service was great.

  32. Steven W. (verified owner)

    GREAT kit, finish outstanding add JP 3.5T spring GOOD TO GO!

  33. Wilfred S. (verified owner)

    BKF LPK is as good as it gets, I find it comparable if not better than AERO Precision. I have bought many of these and never had a fit or function issue. The Enhanced Trigger is pretty sweet compared to the regular Mil Spec BS Trigger.
    Find a better price anywhere?
    I Think Not!

  34. Charles Corey (verified owner)

    Great product, great price, with quick shipping. What’s not to like

  35. Joel (verified owner)

    Shipping time was great. Good product. I would buy again!

  36. Jason A. (verified owner)

    Good quality, and fast delivery

  37. Justin (verified owner)

  38. Anonymous (verified owner)

    Very Easy to deal with. What you see is what you get!

  39. Ben M. (verified owner)

    Great price and quick shipping.

  40. Clayton Williams (verified owner)

  41. Ensa Bajinka (verified owner)

    It was exact product I was expecting, great experience shopping from you guys. Thank you

  42. Ken Rhyne (verified owner)

    Great kits

  43. Rob Maguire (verified owner)

  44. Jonathan Y. (verified owner)

    Quality parts, great price and fast shipping

  45. Tobe B. (verified owner)

    Exactly what I was looking for

  46. Doug (verified owner)

    Item was as described, fast shipping. There was an excess of residual oil and such from manufacturing, but that is to be expected and nothing a good cleaning prior to install wont take care of. Overall, no complaints and look forward to future business with B Kings.

  47. Ronald Wisdom (verified owner)

    BAking filled my order fast and shipped fast

  48. Layne (verified owner)

    Shipped fast and everything was included for the lower build.

  49. Anonymous (verified owner)

    Looking for a mil-spec parts kit to finish your lower? Look no further. Excellent service from BKings!!

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