AR15 Lower Parts Gun Kit by CMMG – Complete Mil-Spec Upgrade for AR Builders and Customizers

Build It Right the First Time with the CMMG AR15 Lower Parts Gun Kit – Precision-Made, Reliable, and Ready for Action
The CMMG AR15 Lower Parts Gun Kit is a premium-quality, mil-spec compliant solution for completing or upgrading your AR-15 lower receiver. Trusted by firearm enthusiasts, builders, and professionals, this all-in-one kit includes everything you need—crafted with the precision, fit, and durability that CMMG is known for. Whether you’re assembling a new rifle or refreshing an existing build, this kit ensures smooth operation and long-lasting performance in any environment.

Key Features & Benefits:

• All-Inclusive Kit: Includes all the essential components to complete an AR-15 lower receiver (excluding pistol grip, trigger guard, and fire control group)

• Mil-Spec Quality: Manufactured to strict military specifications for maximum reliability, compatibility, and performance

• Drop-In Ready: Designed for easy installation with standard AR-15 lower receivers—no fitting or modification required

• Heat-Treated Components: Precision-machined and treated for enhanced strength, wear resistance, and durability

• Perfect for Builders & Upgraders: Ideal for custom rifle projects, lower rebuilds, or keeping spare parts on hand

• Backed by CMMG Craftsmanship: Trusted U.S.-based manufacturer known for producing combat-ready, high-performance AR components

Included Components:

• Takedown pin

• Takedown pin detent

• Pivot pin

• Pivot pin detent

• Bolt catch

• Bolt catch plunger

• Bolt catch roll pin

• Bolt catch spring

• Magazine catch

• Magazine catch button

• Magazine catch spring

• Buffer retainer

• Buffer retainer spring

• Selector lever

• Selector detent

• Selector detent spring

• Trigger spring

• Hammer spring

• Disconnector spring

• Trigger pin

• Hammer pin

Product Specifications:
Compatibility: Standard AR-15 mil-spec lower receivers
Material: Hardened steel and reinforced polymer (where applicable)
Finish: Matte black corrosion-resistant coating (varies by component)
Installation: Fits most AR-15 lower receivers with no modifications required
Weight: Approx. 3.5 oz total (varies by batch and material lot)

Usage Instructions:

1. Ensure the firearm is unloaded and safe before starting installation

2. Follow a step-by-step AR-15 lower receiver assembly guide or consult a qualified gunsmith

3. Use proper tools and techniques to avoid damaging components during installation

4. Function test all installed parts before live-fire use

Warranty Information:
Covered by CMMG’s Limited Lifetime Warranty against manufacturer defects in materials and workmanship. Contact CMMG for service and support.

Why Choose the AR15 Lower Parts Gun Kit by CMMG?
Built with precision and backed by one of the most respected names in the AR industry, this kit gives you the confidence to build or maintain your AR-15 with parts that meet exacting standards. Whether you're a first-time builder or an experienced armorer, the CMMG AR15 Lower Parts Kit delivers uncompromising quality and dependability with every shot. Build smarter—choose CMMG.