Trinity Force

Alpha AR-15 Lower Build Kit - Sand

(3 reviews) Write a Review
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MSRP: $124.95
— You save $15.00


Alpha AR 15 Lower Build - Sand

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. 


  • Includes Complete Mil Spec Trinity Force Stock
  • Includes Complete Mil Spec Lower Parts Kit (OEM)
  • Includes Mil-Spec Buffer Tube Assembly
    • 6-position 6061-T6 Aluminum Receiver Extension
    • 3 oz Buffer
    • Castle Nut & End Plate
    • Carbine Spring
  • Limited Lifetime Warranty *Warranty does not cover use with 80% lower.
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Warranty Information

This kit comes with our LIMITED LIFETIME WARRANTY* in the rare case you need one. Each part is personally inspected for quality and hand packaged to ensure your satisfaction. *Note: Warranty only valid when used with mil-spec lower, warranty does not cover use with 80% lower.
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3 Reviews

  • 5
    Great product

    Posted by Leon Cordero on Dec 22nd 2019

    Went on easy, and the finish is good.

  • 5
    Great Little Kit!

    Posted by Christopher Stephens on Sep 20th 2019

    This kit is awesome! Very lightweight stock. The upper part where your cheek goes feels just a little softer, and it really makes your cheek weld comfortable. The trigger is nothing special, but really, what do you expect with this kit? A good trigger kit is the same price as this entire kit. It works nicely, feels fairly smooth, no excessive takeup, it just feels a hair better than some other cheap triggers I've used. The grip is extremely comfortable. I have large hands. The A2 grip is not great for my hand. This has a nice texture to it and is a little wider than standard grips. I purchased one kit, got it in, got it installed, then decided I needed another for another build. I just used the "OEM LPK" on each two kits I purchased. No issues. For what you're getting, this is a great kit. BRD shipped mine pretty quick. What rifles I would install this on depends on the rest of the setup. As I mentioned, this stock is very lightweight, which worked great on my Diamondback upper assembly with 16" barrel and lightweight MLOK handguard. I tried it out on my PSA 18" barreled upper, that has a heavier free-float handguard with Pic rails on all four sides at each end, but not full length. It's a pretty beefy handguard. When I swapped the upper over to the lower with this kit installed, I didn't like it. It was too front heavy. For that rifle or similar setups, I'd stick with a little heavier stock, like the Leapers UTG AR-15 PRO Model 4 Combat Ops S1 that came with my rifle when I got it. The FDE color matched well with my Aero Precision Cerakote lower and Diamondback upper. That is one thing I was worried about. Like I said, already have another on the way. Great kit for a great price. BRD has been my go-to for 3 builds now, and they're the first place I check when I'm planning more builds.

  • 5
    Great product

    Posted by Joshua on Apr 22nd 2019

    Received this kit, I thought not only was it a great deal but once I got it in hand I really liked it. The grip and stock have a great texture and the trigger has a good pull. I would recommend this kit it has everything you need!

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