Rise Armament 12003ADV Premium Lower Parts Kit Black Aluminum
$129.99
$139.99
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Building an AR-15 from a stripped lower receiver requires more than just any parts—it demands quality components that work together seamlessly. The Rise Armament 12003ADV Premium Lower Parts Kit in black aluminum delivers exactly that: a complete, matched set of pins, springs, and hardware designed to function as a cohesive system rather than a collection of commodity items. Where standard LPKs leave you with basic mil-spec parts, Rise upgrades you with ambidextrous controls, refined ergonomics, and precision manufacturing from the ground up. This kit is purpose-built for shooters who want their lower to perform and feel noticeably better without requiring a custom assembly of individual components sourced from multiple suppliers.
The standout components here are distinctly Rise-engineered. The ambidextrous safety selector features captured detents and interchangeable paddles with a 69-degree throw, giving you true left-right operation without the wobble of cheaper selectors. The enhanced takedown and pivot pins use concave faces and beveled edges with a tool-assist cavity—details that matter when you're maintaining your rifle or field-stripping in less-than-ideal conditions. The trigger guard swings open on aircraft-grade aluminum, and the oversized magazine release button gets enhanced texture for actual control instead of a slick, smooth surface you have to hunt for under gloves or stress.
Everything you need to complete your lower is included: trigger guard, bolt catch, magazine catch, safety selector, pins, springs, detents, and hardware. This is a true "lower parts kit"—you're not buying a partial kit and hunting for missing pieces. The black aluminum finish complements modern rifle builds and handles the wear and tear of regular use. Whether you're an experienced builder looking to avoid budget parts or a first-timer who wants a lower that feels right from assembly, this kit eliminates the guesswork and delivers proven, user-focused design at every control point.
Key Features
- Ambidextrous safety selector with captured detents and interchangeable paddles (69-degree throw)
- Enhanced takedown and pivot pins with concave faces, beveled edges, and tool-assist cavity
- Aircraft-grade aluminum swing-open trigger guard
- Oversized magazine release button with enhanced texture for improved grip
- Enhanced bolt catch for reliable lock-back and easy release
- Complete hardware set: all pins, springs, detents, and fasteners included
- Black aluminum finish
Specifications
| Brand | Rise Armament |
| Model | 12003ADV |
| Type | Premium Lower Parts Kit |
| Platform | AR-15 |
| Finish | Black Aluminum |
| Safety Selector Type | Ambidextrous with interchangeable paddles |
| Safety Selector Throw | 69 degrees |
| Trigger Guard Material | Aircraft-grade aluminum |
| Trigger Guard Design | Swing-open |
| What's Included | Ambidextrous safety selector, enhanced takedown pins, enhanced pivot pins, trigger guard, oversized magazine release button, enhanced bolt catch, magazine catch, trigger pins (2), safety detent pin, safety detent spring, takedown/pivot pin detents (2), takedown/pivot detent springs (2), magazine catch spring, bolt catch spring, bolt catch plunger, bolt catch roll pin, buffer retention pin, buffer retainer spring, trigger guard pin |
Frequently Asked Questions
Is this a complete AR-15 lower parts kit with everything I need?
Yes. The Rise Armament 12003ADV includes all the pins, springs, detents, hardware, and components necessary to complete your AR-15 lower receiver. You won't need to source additional parts from elsewhere.
What caliber does this lower parts kit work with?
This is an AR-15 platform lower parts kit. It is compatible with standard AR-15 uppers in common calibers that use the AR-15 lower interface.
Does the safety selector work for left-handed shooters?
Yes. The included ambidextrous safety selector features interchangeable paddles and captured detents, enabling safe and efficient operation for both left and right-handed shooters.
What makes the Rise components different from standard lower parts?
Rise Armament's components in this kit feature refined design details: the safety selector includes captured detents and offers a 69-degree throw; the takedown and pivot pins have concave faces, beveled edges, and a tool-assist cavity for easier field maintenance; the trigger guard is aircraft-grade aluminum with a swing-open design; and the magazine release button features enhanced texture for more positive control. These upgrades improve usability and performance over mil-spec parts.
