When you’re building a rifle you can count on, start with the best — the Bushmaster M4 Complete Lower. Designed for seamless compatibility with 5.56 NATO and .223 Remington uppers, this complete lower provides a durable, versatile, and ergonomic foundation for your next AR-15 project. Featuring a matte black finish, a collapsible M4 stock, and an A2 pistol grip, this lower is ready for action right out of the box.
Whether you’re upgrading an existing build or assembling a new rifle from scratch, the Bushmaster Complete Lower delivers the quality and dependability that serious shooters demand — all in a lightweight, rugged package.
Key Features
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Fully Assembled: Ready to pin to any mil-spec compatible upper receiver for fast, reliable builds.
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Collapsible M4 Stock: Adjustable length of pull for personalized fit and improved maneuverability.
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A2 Pistol Grip: Provides a secure, ergonomic hold for better control during rapid or precise shooting.
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Matte Black Finish: Tough, tactical appearance with a durable coating built for the range and field.
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Lightweight Design: Weighs just 2 lbs, helping keep your finished rifle nimble and easy to handle.
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2-Position Safety: Simple and reliable selector for confident operation.
Specifications
| Feature | Details |
|---|---|
| Manufacturer | Bushmaster |
| Model | M4 Complete Lower |
| Family | AR-15 Rifle Series |
| Caliber Compatibility | .223 Remington / 5.56 NATO |
| Type | Accessory – Lower Receiver |
| Finish | Matte Black |
| Finish Type | Black |
| Stock | Collapsible / Folding M4 Stock |
| Grip | A2 Pistol Grip |
| Weight | 2 lbs |
| Safety | 2-Position Safety Selector |
| Shipping Weight | 2.95 lbs |
| UPC | 604206203168 |
| Manufacturer Part Number | 00-20010-BLK |
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