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Ar-15 Billet Lower Receiver - Ar-15 Lower Receiver, Billett, Multi-Cal
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$129.99
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SKU: 100041549
Overview
This stripped lower receiver is intended as the foundation for an AR15 build, giving you a mil-spec dimensioned base that works with standard AR15 components. It is suited to builders who want a receiver that supports parts interchangeability and a straightforward assembly process. The upper tensioning screw lets you fine tune the fit between upper and lower, while the flared magwell angle provides a more open feel without increasing the receiver’s footprint. A threaded bolt catch pin adds another practical detail for the build.
Why Hunters Choose the 17 Design And Manufacturing
Machined Mil-spec
Dimensions for standard AR15 component
Stripped Lower
Receiver provides a solid base
Upper Tensioning
Screw lets users fine-tune upper-to-lower
Flared Magwell
Angle adds a more open
Includes Threaded
Bolt catch pin for added
Key Features
- Stripped AR15 lower receiver from 17 Design & Manufacturing.
- Machined to mil-spec dimensions for standard AR15 component compatibility.
- Designed as a base for an AR15 build.
- Upper tensioning screw lets users fine-tune upper and lower fit.
- Flared magwell angle adds a wider feel without increasing receiver footprint.
- Includes a threaded bolt catch pin.
Best Used For
- AR-15 builders seeking a stripped lower receiver for a standard parts-based custom build
- Users wanting mil-spec dimensions for compatibility with standard AR-15 components
- Hunters or shooters who prefer an upper-to-lower fit that can be fine-tuned
- Builders who value a flared magwell feel without increasing the lower receiver footprint
Specifications
| Bolt Catch Pin | Threaded bolt catch pin |
|---|---|
| Compatibility | Standard AR15 components |
| Dimensions Standard | Mil-spec dimensions |
| Flared Magwell Angle | Yes |
| Multi Cal | Yes |
| Platform | AR15 |
| Receiver Type | Stripped Lower Receiver |
| Tensioning Screw Type | Nylon tipped tensioning set screw |
| Upper Tensioning Screw | Yes |
Pros
- Machined to mil-spec dimensions for standard AR15 component compatibility.
- Stripped lower receiver provides a solid base for a custom AR15 build.
- Upper tensioning screw lets users fine-tune upper-to-lower fit.
- Flared magwell angle adds a more open feel without increasing footprint.
- Includes a threaded bolt catch pin for added assembly convenience.
Considerations & Trade-offs
- Requires standard AR15 components, so it is best suited to builders already committed to that platform and parts ecosystem.
- As a stripped lower receiver, it is only the foundation of the build and does not provide a complete firearm on its own.
- The upper tensioning screw is a fit-tuning feature, but final upper-to-lower fit may still require adjustment during assembly.
- The flared magwell angle is designed to improve the feel of reloads without increasing the receiver footprint, but it is not the same as a larger magwell opening.
Suggested Comparisons
- AR-15 stripped lower receiver
- AR-15 lower parts kit
- AR-15 upper receiver
- AR-15 complete lower receiver
Suggested Accessories
- Lower parts kit
- Buffer tube assembly
- Magazine
- Upper receiver assembly
Frequently Asked Questions
Is this a complete lower receiver or a stripped lower receiver?
It is a stripped AR15 lower receiver, intended as the base for a build.
What type of components is this lower designed to work with?
The product description says it is machined to mil-spec dimensions and works with standard AR15 components.
Does this lower include an upper tensioning adjustment?
Yes. It includes an upper tensioning screw with a nylon-tipped tensioning set screw in the grip tang to let the user fine tune the fit between the upper and lower.
What does the flared magwell feature do?
The description says the flared magwell angle provides a more flared feel without increasing the width or footprint of the lower receiver.
Does it have a threaded bolt catch pin?
Yes. The listed features include a threaded bolt catch pin.