CMMG Gun Builder’s Lower Parts Kit for AR-15 Rifles

The CMMG® Gun Builder’s Lower Parts Kit contains most of the necessary components you need to build up your AR-15 lower receiver—except for commonly upgraded parts like the trigger group and pistol grip.

Features:
• Compatible with AR-15 lowers
• Includes most of the necessary components besides commonly upgraded components
• All parts are mil-spec or better

Includes:
• Trigger guard and roll pin
• Bolt catch, plunger and spring
• Safety selector
• Mag catch, mag catch spring, and mag release button
• Detent and detent spring
• Pivot pin
• Buffer retainer and retainer spring
• Takedown pin

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Key Specifications

• Item Number: 720990
• Mfg. Number: 55CA601