Radiata Victrix Full-Size Lower Assembly with Rotary ARC Fire Trigger - SP5 Compatible

Radiata Victrix Full-Size Lower Assembly with Rotary ARC Fire Trigger
SP5 Compatible

Upgrade your SP5-pattern platform with the Radiata Design Victrix Complete Lower, a fully assembled, performance-driven lower receiver engineered for shooters who demand durability, reliability, and modern ergonomics. Designed and built in Texas, the Victrix combines advanced firearms-grade polymer construction with steel-reinforced internals to create a lightweight yet exceptionally robust lower capable of withstanding intensive use and high round counts.

Built around a precision-installed fire control group, this complete lower arrives ready to install right out of the box. Its reinforced internal structure is specifically designed to endure the repeated heating and cooling cycles associated with extended firing sessions while maintaining consistent performance and structural integrity.

The Victrix features a crisp 3.5 lb Nickel Boron single-stage trigger for a clean break and enhanced control, an ambidextrous selector for versatile operation, and includes the highly regarded Forward Controls Design GSA A1 grip. Compatible with full-size SP5-pattern platforms, this true drop-in lower requires no gunsmithing or fitting, making installation quick and hassle-free.

Fully Assembled Complete Lower
Ships ready to install with the fire control group pre-installed, reducing setup time and simplifying upgrades.

Firearms-Grade Polymer Construction
Advanced composite housing provides excellent strength, heat resistance, and reduced weight.

Steel-Reinforced Internal Structure
Reinforced internals enhance durability and maintain reliability during sustained firing schedules.

Precision 3.5 lb NiB Trigger
Nickel Boron-coated single-stage trigger delivers a smooth pull, crisp break, and improved shooting control.

True Drop-In Design
Direct-fit installation eliminates the need for gunsmithing, modification, or extensive fitting.

7075 Aluminum Slip Trip
High-strength aerospace-grade aluminum component provides long-term durability and reliable function.

Ambidextrous Selector
Supports left- and right-handed operation for improved versatility and control.

Forward Controls Design GSA Grip Included
Ships equipped with the FCD GSA A1 grip for enhanced ergonomics and handling.

Texas Designed & Built
Proudly engineered, assembled, and quality-inspected in the USA.

Specifications

• Compatibility: Full-Size SP5-Pattern Platforms 
• Installation Type: True Drop-In
• Assembly Status: Fully Assembled
• Fire Control Group: Pre-Installed
• Housing Material: Composite Polymer
• Internal Reinforcement: Stainless Steel Reinforced Components
• Slip Trip Material: 7075 Aluminum
• Trigger Type: Single-Stage
• Trigger Finish: Nickel Boron (NiB)
• Trigger Pull Weight: 3.5 lbs
• Selector Type: Ambidextrous
• Safety Compatibility: Ambidextrous 3-Position Rotary Safety Compatible
• Grip Included: Forward Controls Design GSA A1 Grip
• Grip Compatibility: Accepts AR-15 Grips (without Beavertails)
• Buffer Material: Polyurethane
• Structural Design: Steel-Reinforced Internal Framework
• Manufacturing Location: Texas, USA

**Please Note: Due to state laws, we cannot ship to: CA, CO, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NV, NY, OR, RI. Double-check your location is eligible before adding to the cart.