ALPHA Lower Build Kit For AR-15

12 reviews Write a Review
Calculated at Checkout


The Alpha AR 15 Lower Build Kit manufactured by Trinity Force is a light weight AR 15 Stock made of a high quality polymer. It has a integrated rubberized cheek rest and QD swivel mount attachment point. These kits come with everything needed to complete your AR 15 Lower Receiver. 

Kit Includes:

  • Includes Complete Mil Spec Trinity Force Stock & Buffer Kit
  • Includes Complete Mil Spec Lower Parts Kit (OEM)
  • Lifetime Warranty

Extra Information


12 Reviews

  • Posted by Eric Leggett on May 22nd 2019


    Great Value for what you get

    Purchased this kit to complete my stripped lower. All the parts fit nicely took 30min to complete. Only issue is that the buttstock has slight rotational movement My AR 7.62x39build looks really good

  • Posted by mike on May 14th 2019


    good product

    Readonably priced works well

  • Posted by Scott on Apr 2nd 2019


    Alpha lower build kit

    Nice kit, packaged well, timely delivery, what more could you want.

  • Posted by Carlos AguirreSobero on Mar 18th 2019


    Alpha Lower Build Kit

    Everything came is in a timely manner and it worked perfectly.

  • Posted by Brian on Mar 15th 2019


    Not real pleased

    Threads on castle not are very sloppy and either reciever end plate or buffer tube needs work, hard to keep straight when tightening not, quality control needs attention

  • Posted by Dschnip on Mar 7th 2019


    Anderson LPK

    The kit went together great. My biggest complaint is that the castle nut must not have been tapped correctly as it will not sit anywhere near flush. There is a little more wobble in the butt-stock than I would like. Everything else though gives this a 4 star.

  • Posted by Mike on Feb 21st 2019



    Great kit. Fuctions perfectly. Installed into an anderson lower paired with a davidson upper an bear creek bcg and parts I sourced here and there and built a great shooting 7.62x39.

  • Posted by Greg S. on Jan 11th 2019


    Alpha Kit

    Had trouble with the website so I called. The employees were more than helpful and got everything squared away for me. Shipped and arrived fast! Kit is of good quality and runs nicely on my 6.5 Grendel! Second kit from them and love both of them!

  • Posted by John D on Jan 11th 2019



    Item was as described, but the customer service was phenomenal. Definitely ordering from here again