UL-15 Rifle Lower Build Kit


Everything you need to transform your UL-15 Lower Receiver into a premium rifle lower

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SKU: SCA-UL15-LWRPTS-RFL Categories: ,

We want to make things easy for our friends and customers, which is why we assembled this carefully curated build kit of every part you’ll need to turn your stripped UL-15 Lower Receiver into a kick*ss rifle lower. These are the parts we recommend – and run on our own guns – to maximize the performance potential of our UL-15 platform.

This kit includes

  • BCM Gunfighter Mod-0 Stock
  • BCM Gunfighter Mod-3 Pistol Grip
  • LaRue Tactical MBT-2S Two-Stage Straight Bow Trigger
  • KAK Buffer Tube Kit
  • Strike Industries Enhanced Lower Parts Kit

A few notes on why we selected each of these products…

BCM (Bravo Company MFG) Gunfighter Stock & Pistol Grip
BCM is a proven name in rifle components with a reputation for extremely high quality and durability. Our experience with BCM products over the years have reinforced this opinion and we’re proud to include these items in our build kit.

LaRue Tactical MBT Trigger
The MBT trigger from LaRue represents one of the best performance-per-dollar purchases that you can make for your AR-15. The MBT sacrifices nothing and performs as well or better than most triggers 3x the price. Meticulously machined out of a solid block of S7 tool steel, it provides a super crisp 4.5lb break (2.5 lb first stage, 2 lb second stage) with a smooth positive reset. Whether you’re a range addict, a doorkicker, or a competitive shooter, we are confident you’ll be impressed with the MBT’s buttery smooth pull and clean break.

KAK Buffer Tube Kit
When it comes to buffer tubes, there isn’t a whole lot to get excited about. However, it’s still a critical component of your firearm and it has to function reliably 100% of the time. We’ve had great luck with KAK’s buffer kit, having put it through many strenuous environments during testing and during our own personal use. They have always performed flawlessly and stood up to every amount of abuse we’ve thrown their way.

Strike Industries Enhanced Lower Parts Kit
It says “Enhanced” in the name… do we even need to go on? Marketing fluff aside, the SI LPK is a great combination of upgraded components that take your rifle from a basic mil-spec configuration up to the level of most top-tier competition rifles. The ambidextrous 3-in-1 safety selector can be configured to operate as a standard 90-deg throw or as a short 60-deg throw which is excellent for quick target engagement and easy re-engagement of the safety after a course of fire. The enhanced mag release and bolt catch have improved surface texture for improved grip while the takedown and pivot pins are precision-machined to add a subtle aesthetic upgrade. All-in-all, it’s a solid collection of parts that won’t leave your rifle looking like it was assembled from a pile of questionable gun show parts.

Weight 48 oz
Dimensions 12 × 10 × 4 in


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