Description
CMC made its name as the brand that pioneered the drop-in trigger, so it was only a matter of time before they put that same attention to detail into a receiver. This stripped AR-15 lower is the starting point for a custom build, machined from a forged 7075-T6 aluminum blank and finished in a clean black anodized coating. It's marked Multi so you can run it with just about any caliber that fits the AR-15 platform, from 5.56 NATO to .300 Blackout and beyond.
What Sets the CMC Stripped Lower Apart
The big draw here is the Mil-Spec M16 low-shelf configuration. That means the fire control pocket is cut to standard dimensions and leaves plenty of room for whatever trigger group you want to drop in, including CMC's own curved and flat-bow units. Since the receiver holds true Mil-Spec dimensions throughout, it mates up with any standard upper and accepts a normal lower parts kit without fuss over fitment.
Building on the CMC AR-15 Lower
This receiver ships stripped, which gives you a blank slate. You'll add your own lower parts kit, trigger, grip, and buffer system to spec it out exactly how you like. For folks putting together a first build or a seasoned hand looking for a dependable base, the forged construction gives you the strength and consistency you want in the part that everything else bolts onto.
Why Go With CMC
This lower is part of CMC's expanded AR-15 component lineup, which now covers uppers, barrels, handguards, bolt carrier groups, and more alongside their fire-control systems. That makes it easy to source a big chunk of your build under one trusted American name. If you already run a CMC trigger and liked what you got, the lower carries that same build quality into the backbone of the rifle.
Key Specifications
- Manufacturer: CMC Triggers
- Model: Stripped Lower Receiver
- Manufacturer Part Number: CMC-AR15-LR-STRIP
- UPC: 810169561782
- Platform: AR-15
- Material: Forged 7075-T6 Aluminum
- Fire Control Pocket: Mil-Spec M16 Low-Shelf Configuration
- Action: Semi-Auto
- Caliber/Gauge: Multi
- Finish: Black Anodized
- Color: Black
- Product Type: Stripped Lower Receiver
What’s Included
- CMC AR-15 stripped lower receiver
Frequently Asked Questions
What does the CMC AR-15 lower come with?
It ships as a stripped lower, so it's just the bare receiver with no internal parts. You'll need to add your own lower parts kit, trigger group, pistol grip, and buffer system to complete the build. This gives you full control over how you spec out the rifle.
Will a standard lower parts kit and trigger fit this receiver?
Yes. The CMC stripped lower holds Mil-Spec dimensions and uses a standard M16 low-shelf fire control pocket, so any Mil-Spec lower parts kit will drop right in. That low-shelf cut also leaves room for CMC's own drop-in triggers as well as other standard trigger groups.
What calibers can I build on the CMC stripped lower?
The receiver is marked Multi, which means it works with the full range of calibers built on the AR-15 platform. That covers popular options like 5.56 NATO, .223 Remington, and .300 Blackout. The caliber is ultimately determined by the upper and barrel you pair with it.
Is this receiver made from forged or billet aluminum?
The CMC AR-15 stripped lower is machined from forged 7075-T6 aluminum. Forged construction is the traditional choice for a durable, strong receiver and is what you'll find on most Mil-Spec AR builds. It gives you a dependable foundation for the rest of your rifle.




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