Description
Building or refreshing an AR-15 lower usually means chasing down a dozen tiny springs, detents, and pins from different bins. The Strike Industries AR Enhanced Lower Parts Kit with Trigger cuts out that hunt by bundling everything you need into one organized package, and it swaps the plain mil-spec bits for Strike's upgraded versions where it counts. About the only thing you'll add is your favorite pistol grip.
What Sets the Strike Industries Enhanced Kit Apart
The heart of this kit is Strike's own fire control group. The trigger and hammer are investment cast, CNC machined, heat treated, and phosphated for corrosion resistance, then run through longitudinally ground and polished sear surfaces. The result is a consistent 4.5 to 5.5 lb pull that feels noticeably smoother than a bargain-bin mil-spec trigger, without giving up the reliability you want in a working rifle. It's a great sweet spot for a general-purpose build where you want a cleaner break but don't need a dedicated match trigger.
The Enhanced Parts Inside This Lower Parts Kit
Strike didn't just toss standard hardware in the bag. You get their enhanced bolt catch with improved grip surfaces and angles, an enhanced magazine catch and catch button, plus longer enhanced pivot and takedown pins. The standout is the 60/90 degree 3-in-1 ambidextrous selector, which lets you run a conventional 90 degree throw or flip to a shorter 60 degree throw for faster manipulation. It ships with two levers and an end plate, so you can set it up ambi or strong-side only depending on how you shoot.
Getting Your Strike Industries Lower Built
This is a straightforward drop-in kit for standard AR-15 lowers, and builders consistently praise the fit and finish for the money. All the detent springs, the buffer retainer, trigger pin and spring, and bolt catch roll pin are here, so nothing holds up your assembly. Whether you're starting a fresh build or upgrading a plain-jane lower, it's a clean, complete way to get there. A little thread locker on the selector screws is smart insurance once you settle on your preferred throw.
Key Specifications
- Manufacturer: Strike Industries
- Manufacturer Part Number: ARELRPTH
- Model: Lower Parts Kit
- Product Type: Lower Parts Kit with Trigger
- UPC: 708747544954
- Platform: AR-15
- Trigger Pull: 4.5 to 5.5 lbs
- Fire Control Group: Investment cast, CNC machined, heat treated, phosphated
- Finish: Manganese Phosphate
- Material: Steel
- Color: Black
- Selector: 60/90 degree 3-in-1 ambidextrous
- Grip: Not included
What’s Included
- Fire control group (trigger, hammer, disconnector)
- Enhanced bolt catch
- Enhanced magazine catch
- Enhanced magazine catch button
- Enhanced pivot pin
- Enhanced takedown pin
- 60/90 degree 3-in-1 selector shaft
- Two SI selector levers
- SI selector end plate
- Bolt catch spring, plunger, and roll pin
- Buffer retainer and spring
- Disconnector spring
- Hammer spring
- Magazine catch spring
- Pivot detent and spring
- Selector detent and spring
- Takedown detent and spring
- Trigger detent, pin, and spring
Frequently Asked Questions
Does the Strike Industries Enhanced Lower Parts Kit include everything to finish a lower?
It includes all the small parts, springs, detents, pins, and a complete fire control group needed for a standard AR-15 lower. The one thing it does not come with is a pistol grip, so you'll want to add your favorite grip. Once you drop in a grip you're set to complete the receiver.
What is the trigger pull weight on this kit?
The Strike Industries fire control group delivers a consistent 4.5 to 5.5 lb pull. The sear surfaces are longitudinally ground and polished for a smoother break than a typical mil-spec trigger, while keeping reliable, dependable function. It's a solid middle ground for range, defense, or general-purpose builds.
How does the 60/90 degree selector work?
The included 3-in-1 selector lets you choose between a standard 90 degree throw or a shorter 60 degree throw for faster manipulation. It ships with two levers and an end plate, so you can run it ambidextrous or as a strong-side-only setup. Many builders add a bit of thread locker on the screws once they pick their preferred throw.
Will this kit fit any standard AR-15 lower receiver?
Yes, it's designed as a drop-in kit for standard mil-spec AR-15 lower receivers. The enhanced pins, catches, and fire control group all follow standard dimensions, so there's no gunsmithing required. Builders regularly note the fit and finish punches above its price point.





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