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BKF AR15 Enhanced Lower Build Kit W/ SBA3 Brace

(72 customer reviews)

$199.99 $149.99

18 in stock


This product is 100% made in the USA! All components are quality Mil-Spec parts for completing your AR15 lower receiver. Trust in BKF for a smooth hassle free build.

ELG stands for ‘Enhanced Longitudinal Grind’. Our new lower parts kits have set the standard when it comes to out-of-the-box mil-spec performance.  At the heart of this kit stands the longitudinally-ground trigger, which is ground in-line with the direction of pull along the long axis of the trigger, and then finish-polished. This grind and polish provide two significant advantages over standard mil-spec kits: 

  • A smoother pull with reduced grittiness

  • An enhanced basis for performing a trigger job


  • ‘ELG’ Fire Control Group (Trigger, Hammer, Disconnector)
  • Billet magazine release Button
  • 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 Small Parts Kit
    • Takedown Pin
    • Takedown Pin Detent
    • Pivot Pin
    • Pivot Pin Detent
    • Trigger Pin
    • Hammer Pin
    • Selector Pin
    • Bolt Catch Roll Pin
    • Bolt Catch Buffer
    • 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

AR15 SB Tactical SBA3 Pistol Stabilizing Brace W/ Mil Spec Buffer Tube Assembly – Black


  • AR15 SB Tactical SBA3 Pistol Stabilizing Brace – Black
  • BKF T6 6061 Mil-Spec buffer tube (6 Position) – U-cut Anti-Rotation
  • BKF Industries AR15 Mil-Spec Carbine Buffer
  • BKF Industries AR15 Carbine Buffer Spring Mil Spec
  • BKF AR15 Receiver Extension End Plate – Mil Spec
  • BKF AR15 Receiver Extension Lock Nut Mil Spec
Does not include Manufacture Packaging 

Additional information

Weight 1 lbs
Dimensions 8 × 4 × 4 in


Product Type




72 reviews for BKF AR15 Enhanced Lower Build Kit W/ SBA3 Brace

  1. Andrew (verified owner)

    Quality Parts

  2. gerard (verified owner)

    Perfect, just what I needed to finish my lower. 🇺🇸🇺🇸🇺🇸

  3. Tyler Robinson (verified owner)

    Awesome service.

  4. Chad Stevenson (verified owner)

    quick service combined with the product as promised

  5. Odaliz B V. (verified owner)

    Exactly what I expected…perfect…

  6. Devon (verified owner)

    You guys ROCK! Buys again in two weeks.

  7. Christian (verified owner)

    Everything included to finish a lower, cant ask for much else

  8. Barry (verified owner)

    excellent price for this set up fast shipping

  9. Justin Palmer (verified owner)

    Easy build. Handle is/was pretty loose. And brace will not stay or lock in place. Just slides right off. Not sure if it’s user error or what.

  10. Brenda C. (verified owner)

    Excellent product and service!

  11. Keith O. (verified owner)

    Hands down best price and quality,thanks BKF

  12. Michael (verified owner)

    Awesome service and delivery speed! I will definitely be shopping here again.

  13. Gilles M. (verified owner)

    The best price anywhere!

  14. Anonymous (verified owner)

    Great deal!

  15. Matthew Davidson (verified owner)

    Great price and fast

  16. Gary (verified owner)

    An awesome kit at an awesome price!

  17. Anonymous (verified owner)

    The SBA3 enhanced lower kit was awesome! The trigger in particular was much better than stuff at the same price range (my experience with Anderson and Critical Capabilities).

    Customer service was equally awesome! Ordered on a Sunday night, shipped out Monday morning! Highly recommend BKF and this kit!

  18. Anonymous (verified owner)


  19. Derek (verified owner)

    Very impressed with the quality of this lower parts kit! Trigger breaks very clean. Great value too!

  20. Anonymous (verified owner)

    Solid product with a good trigger

  21. Barry Morris (verified owner)

    everything as advertised. Very satisfied.

  22. Bryan Vavonese (verified owner)

    Great deal. Perfect fit and finish

  23. Anonymous (verified owner)

    Great kit

  24. Derek (verified owner)

    Great price on a quality kit with everything needed for a pistol lower. Not really sure the ”enhanced” fcg makes too much of a difference to my fingers but it can’t hurt.

  25. Casey S. (verified owner)

    Nice lower parts kit, nice buffer tube

  26. Parker (verified owner)

    Went together well at an AMAZING price!!

  27. Joshua D. (verified owner)

    Fast and timely service! Cheapest I found on the internet!

  28. Kenneth P. (verified owner)

    Will order again.great price

  29. Paul P. (verified owner)

    Very high quality items, great price and super fast shipping.

  30. Dana Fields (verified owner)

    Just what I needed!

  31. Troy (verified owner)

    Quality prouducts at a good price. This is going in my next project.

  32. Trevor H. (verified owner)

    Nice kit. Will definitely buy another for the next build

  33. johnsoncody91 (verified owner)

    Arrived fast. This brace is top notch. All contact points on the trigger system arrived polished. All in all worth every penny!

  34. Derek K. (verified owner)

    Went together perfect, was well worth the price.

  35. Paul A. (verified owner)

    I need to put this on my lower still, and all parts came with no blemishes. This was the best deal on the internet!

  36. Cody Johnson (verified owner)

    Great product, great prices, shipped super fast. Will use these guys again!

  37. jacque m. (verified owner)

    Great price for this kit, the brace is awesome

  38. Anonymous (verified owner)

    Good deal fast shipping

  39. William (verified owner)

    Was EVERYTHING I needed to complete a dedicated pistol lower, all in one place, in one package & at a phenomenal price.
    Everything fit great & went together smoothly.
    Already looking at making another order in several days.

    My ONLY complaint is that I wish I had found BKing’s a year ago BUT blame that on Google, NOT BKing’s.

    WiCkeD StaR

  40. Paul P. (verified owner)

    Great products and fast shipping

  41. David english (verified owner)

    Awesome product at an awesome price
    Fast shipping. Great vendor

  42. Gary (verified owner)

    Prices couldn’t be beat and shipping was super fast. Great company to do business with, I’ll be back!

  43. David (verified owner)

    Good prices and prompt Delivery!

  44. Josh L. (verified owner)

    Great piston build kit. everything i needed to finish my lower.

  45. Daniel Lewis (verified owner)

    A-ok glad I found for the price

  46. David (verified owner)

    This is probably the best deal you will find period even with a little shipping this checked all the boxes. SB brace with buffer tube kit and the lower parts kit all US made for less than $140.00 to my house. The only complaint I have is I didn’t grab a second set now I am sadly awaiting a back in stock notification. BKing’s pricing has always been solid (no it’s not always the absolute cheapest ……. but it’s well within and in this case even better and hey you’ll even get you stuff in a timely fashion)

  47. Michael Bean (verified owner)

    You guys rock… shipping too

  48. Ronnie J. (verified owner)


  49. Lucas (verified owner)


  50. Ralph L. (verified owner)

    I was surprised on how quick I received my order. This was my first order with you. I was also very happy with the quality of the parts in my AR pistol lower kit. Going forward, I will be doing business with you guys in the future.

  51. Scott Summers (verified owner)

    Are you kidding me, where else will you find all these items for 130 Bucks?

  52. Adam K. (verified owner)

    Awesome product, cheapest price online and quick delivery, will be purchasing again soon!

  53. Brad (verified owner)

    Great value, fast shipping.

  54. Michael (verified owner)

    Great Service, Quality Parts

  55. Anonymous (verified owner)

    Would do business with B King again

  56. Vien D. (verified owner)

    Excellent customer service! Would highly recommend.

  57. Anonymous (verified owner)

    Very happy with what I got, exactly as advertised and a great price

  58. Randy D. (verified owner)

    Great price and quick shipment.

  59. Nicholas E. (verified owner)

    The trigger feels nice and crisp and I didn’t have any issues assembling my lower with this kit.

  60. David (verified owner)

    As always great products from a great company can’t wait to put this one too use.

  61. Brandon W. (verified owner)

    Great parts pack. Fit well in the anderson lower I used. Will use again.

  62. STEVE P. (verified owner)

    Great price and very fast shipping.

  63. Walter G. (verified owner)

    It’s a great deal!

  64. Joe (verified owner)

    Definitely buy from again. Product is exactly as described.

  65. Anonymous (verified owner)

    all the parts were there, quality stuff. fast shipping, will do business here again

  66. Charles Baxter (verified owner)

    This was actually an even better kit than I originally thought. Also, y’all are jam up as far as communication and punctuality. It shipped fast and I am very impressed. Keep up the excellent work.

  67. Jason S. (verified owner)

    Just as expected.

  68. Anonymous (verified owner)

    Great deal, easy company to work with

  69. Zane (verified owner)

    Awesome product. Great customer service.

  70. Chase Maag (verified owner)

    bought for a future build but the parts look good, maybe a small blemish on the tube but that is it

  71. Kyle H. (verified owner)

    Had everything I needed to rock n’ roll. After I assembled this kit on my lower I only needed to attach my friends assembled upper and I was shooting! The trigger creeps a little to break which some prefer. Overall a solid kit at an unbeatable price.

  72. louis tucci (verified owner)

    Extremely happy with this lower brace kit! Everything fits perfectly, and shipping was quick. I will definitely do business with BKings again soon!

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