CMMG Zeroed AR-15 Enhanced Ambidextrous Lower Receiver Parts Kit

The CMMG Zeroed AR-15 Enhanced Ambidextrous Lower Receiver Parts Kit is a complete fire control group and assembly solution for AR-15 builders who want to skip the parts-hunting phase and get straight to building. Whether you're assembling your first rifle or your fifth, this kit bundles everything needed for the lower receiver's trigger group and safety controls in one organized package, eliminating the guesswork of sourcing individual springs, pins, and levers from multiple suppliers.

What sets this kit apart is the ambidextrous safety lever—a practical upgrade for shooters who run lefty or simply prefer the ergonomic advantage of controls accessible from both sides. Each component arrives color-coded by assembly stage, so you can follow a logical build sequence without cross-referencing manuals or wasting time identifying parts that look alike. This level of organization appeals equally to methodical first-time builders and experienced gunsmiths who value efficiency.

CMMG has engineered this kit to maintain the tolerances and function standards expected in AR-15 platform builds. All springs, pins, and functional parts are included—no stripped-down "partial" kits that force you to source critical components elsewhere. Once installed in a compatible lower receiver, these parts deliver the reliability AR builders have relied on for decades.

Key Features

• Complete lower receiver fire control group components in one kit
• Ambidextrous safety with detent and spring for both-hand operation
• Color-coded packets for simplified assembly sequence
• All trigger group and hammer springs included
• Bolt catch, plunger, and spring for upper receiver interface
• Magazine catch, release button, and spring
• Trigger guard with roll pin
• All necessary retaining pins for hammer and trigger

Specifications

Frequently Asked Questions

What lower receiver is this kit designed for?

This fire control group kit is engineered for standard AR-15 lower receivers. Confirm your lower's receiver dimensions and take-down pin spacing match AR-15 specs before assembly.

Does this kit include a lower receiver itself?

No—this kit contains only the fire control group and safety controls. You'll need to purchase a lower receiver separately and install these parts into it.

Can I use this kit if I'm left-handed?

Yes. The ambidextrous safety included in this kit functions from both the right and left side, making it suitable for left-handed shooters or anyone who prefers controls accessible from both sides.

Are all the springs and pins included?

Yes. The kit includes all springs, detents, and roll pins necessary to assemble the complete fire control group. No additional components are required for installation into a compatible lower receiver.