AERO M5 308 LOWER PARTS KIT MINUS FCG/PG

The Aero M5 308 Lower Parts Kit Minus FCG/PG gives you all the small components you need to complete an Aero Precision M5 .308 AR lower receiver—without paying for parts you'll replace anyway. If you're building a modern .308 AR platform rifle, you already know you'll be dropping in an aftermarket trigger and pistol grip that suit your shooting style. This kit strips away the fire-control group and grip to let you source those pieces separately, keeping costs down and giving you full control over your build's final configuration.

The kit includes everything else: takedown and pivot pins, springs, and detents sized specifically for the M5 platform; bolt catch assembly with spring and roll pin; safety selector with spring and detent; buffer retainer and spring; and magazine catch components with extended button. All the hardware is spec'd for .308-pattern lowers and engineered to Aero's exacting standards. Worth noting: this kit will also function on DPMS-pattern lowers, though the takedown and pivot pins will protrude slightly further than designed.

Whether you're a seasoned AR builder customizing your next long-range rig or a first-timer assembling a dedicated .308 hunting rifle, this parts kit streamlines the build process and lets your trigger and grip choices take center stage. It's the smart move for builders who know exactly what they want in their trigger assembly.

Key Features

• M5 .308 platform-specific components for correct fit and function
• Complete lower assembly minus fire-control group and pistol grip—you supply those
• Includes bolt catch assembly, safety selector, takedown and pivot hardware, buffer retainer, and magazine catch with extended button
• Also compatible with DPMS-pattern lowers (with slight pin protrusion)
• Aero Precision quality and precision machining throughout

Specifications

Frequently Asked Questions

Will this kit work with my DPMS .308 lower?

Yes, this M5 kit is compatible with DPMS-pattern lowers. However, the takedown and pivot pins will stick out further than they would on an M5 receiver, so keep that in mind if aesthetics matter to you.

What do I still need to buy to complete my .308 lower?

You'll need a fire-control group (trigger, hammer, and disconnector) and a pistol grip. Many AR-15 triggers are drop-in compatible with .308 lowers, giving you lots of options.

Does this kit include a lower receiver?

No, the lower receiver is sold separately. This kit contains only the small parts and springs needed to complete an already-acquired M5 .308 lower.

Is this kit suitable for a first-time AR builder?

If you're comfortable assembling a .308 AR lower and selecting your own trigger and grip, absolutely. The parts are straightforward and Aero's instructions are solid. If you prefer an all-in-one kit, look for a complete lower parts kit that includes the fire-control group and grip.