Primary Weapons System MK1 MOD 2-M Complete Lower Receiver

Primary Weapons System MK1 MOD 2-M Complete Lower Receiver

The PWS MK1 MOD 2-M Complete Rifle Lower sets a new standard in modular AR-15 platform design, delivering a rugged, ambidextrous foundation built for adaptability, control, and long-term reliability. Precision-machined from forged 7075-T651 aluminum and finished with a Mil-Spec Type III Class 2 hard coat anodizing, this lower receiver is engineered to withstand hard use while maintaining a lightweight, performance-driven profile.

Designed around true user-centric functionality, the MK1 MOD 2-M features fully ambidextrous controls that make transitions seamless for both left- and right-handed shooters. Whether on the range, in training environments, or configured for duty use, this lower delivers intuitive handling and consistent ergonomics under pressure.

At its core is a Mil-Spec enhanced trigger with a PTFE coating, offering a smooth, reliable pull adjustable between 5.5 and 6.5 lbs for shooter preference. Paired with the PWS Enhanced Buffer Tube system—featuring a ratchet-lock castle nut and integrated QD mount—the platform ensures secure assembly and dependable performance during recoil cycling.

The inclusion of a PWS Enhanced H2 steel buffer further refines recoil management, promoting smoother cycling and improved shot-to-shot stability. Outfitted with Magpul MOE SL furniture and an MOE K2 grip, the MK1 MOD 2-M delivers enhanced comfort, control, and modular readiness straight from the factory.

Fully Ambidextrous Control System
Designed for seamless operation by both left- and right-handed shooters for maximum adaptability.

Forged 7075-T651 Aluminum Construction
High-strength aerospace-grade material ensures long-term durability and structural integrity.

Mil-Spec Type III Hard Coat Anodizing
Enhanced surface protection against wear, corrosion, and environmental exposure.

Enhanced Mil-Spec Trigger
PTFE-coated trigger delivers smooth operation with a consistent 5.5–6.5 lb pull range.

PWS Enhanced Buffer Tube System
Includes ratchet-lock castle nut and integrated QD mount for secure and stable configuration.

H2 Steel Buffer Assembly
Improves recoil control and cycling smoothness for better shooting stability.

Magpul MOE SL Stock
Lightweight, ergonomic stock designed for comfort and consistent shoulder positioning.

Magpul MOE K2 Grip
Vertical-angle grip enhances weapon control and reduces wrist fatigue.

In-House PWS Manufacturing
Precision-built by Primary Weapons Systems for consistent quality control and performance.

Specifications

• Receiver Material: Forged 7075-T651 aluminum
• Receiver Finish: Mil-Spec Type III Class 2 hard coat anodized
• Lower Type: Ambidextrous
• Platform Compatibility: AR-15
• Weight: 2.3 lbs
• Trigger Type: Mil-Spec enhanced trigger
• Trigger Coating: PTFE coated
• Trigger Pull Weight: 5.5 – 6.5 lbs
• Buffer Tube: PWS Enhanced Buffer Tube
• Buffer Tube Features: Ratchet-lock castle nut, integrated QD mount
• Buffer Type: PWS Enhanced H2 steel buffer
• Stock: Magpul MOE SL stock
• Grip: Magpul MOE K2 pistol grip