Rise Armament Combo Kit – RA-100F Flat Two-Stage Trigger w/12003 Lower Parts Kit

Upgrade your AR-15 build with the Rise Armament Combo Kit, featuring the RA-100F Flat Two-Stage Trigger and the 12003 Lower Parts Kit. This powerhouse combination delivers exceptional precision and reliability, transforming your rifle from standard mil-spec performance to a smooth, responsive shooting experience that’s perfect for tactical enthusiasts, competitive shooters, and everyday range warriors.

Key Features

• RA-100F Two-Stage Trigger: Engineered with a flat trigger bow for enhanced control and a crisp 90-degree break, this component trigger offers a light 1.5 lb first stage take-up followed by a defined 3 lb second stage—totaling 4.5 lbs—for deliberate, accurate shots without the creep of basic triggers.
• Hard-Hitting Hammer: Provides robust primer strikes, ensuring reliable ignition even with challenging steel-cased ammunition, reducing misfires and boosting confidence in high-stakes scenarios.
• 12003 Lower Parts Kit: A complete 20-piece mil-spec kit excluding the fire control group, including essential components like takedown pins, bolt catch, magazine release, and safety selector to fully assemble your lower receiver with durable, high-quality parts.
• Easy Integration: Non-drop-in design allows for straightforward installation in standard AR-15 lowers, compatible with most mil-spec platforms for a seamless upgrade.

Technical Specifications

• Trigger Style: Two-Stage
• Stage 1 Pull Weight: 1.5 lbs
• Stage 2 Pull Weight: 3 lbs
• Total Pull Weight: 4.5 lbs
• Trigger Bow: Flat
• Drop-In: No (Component Style)
• Weight: 8.3 oz
• Dimensions: 7.5″ L x 4.5″ W x 1.5″ H

Why Choose the Rise Armament Combo Kit?

Struggling with gritty mil-spec triggers that hinder your accuracy or incomplete lower builds that leave you piecing together parts? This combo kit solves those pain points by providing a refined two-stage pull that enhances shot-to-shot consistency and faster follow-ups, while the comprehensive LPK ensures your lower is battle-ready without compatibility headaches. Built for durability, it outperforms stock setups in smoothness and strength, offering premium feel at an accessible level—ideal for custom AR-15 projects where reliability meets precision.

Whether you’re assembling your first rifle or refining a duty weapon, the RA-100F and 12003 kit deliver tangible benefits: sharper trigger response for tighter groups, reduced fatigue during extended sessions, and peace of mind from proven components that handle real-world abuse.

Frequently Asked Questions

Is the RA-100F trigger compatible with AR-10 platforms?
Yes, the RA-100F is designed for both AR-15 and AR-10 rifles, ensuring versatile performance across platforms.

How difficult is installation for this combo kit?
The component-style trigger installs like a standard mil-spec unit with included pins and springs, while the LPK components fit standard AR-15 lowers—basic tools and AR assembly knowledge are sufficient for most builders.

Does this kit include everything needed for a complete lower assembly?
Yes, combining the trigger with the 20-piece LPK provides all fire control and functional parts (minus buffer and stock) for a fully operational lower receiver.

Elevate your AR-15’s performance today with the Rise Armament Combo Kit—precision engineering that turns every pull into a perfect shot. Add it to your build and experience the difference in control and reliability.