If you're starting an LR-308 build, you'll need a good lower parts kit. Aero Precision makes a lower parts kit designed for their M5, which is Aero Precision's version of a .308 AR. This high-quality M5 LPK is also compatible with our LR-308 80% lowers.
NOTE: Minor variances between M5 and LR-308 receivers mean the pivot and takedown pins in this kit will protrude farther from the lower receiver, compared to those of a standard lower parts kit.
- Takedown/pivot Spring
- Takedown/pivot detent
- Trigger/hammer pin
- M5 .308 Takedown pin
- M5 .308 Pivot pin
- M5 .308 Bolt Catch
- Bolt Catch Spring
- Bolt Catch Buffer
- Bolt Catch Roll pin
- Safety Selector
- Safety Selector Spring
- Safety Selector Detent
- Buffer Retainer
- Buffer Retainer Spring
- A2 Pistol Grip
- Pistol Grip Screw
- Pistol Grip Lock Washer
- Trigger Spring
- Hammer Spring
- Disconnector Spring
- Magazine Catch Body
- Magazine Catch Spring
- Extended Magazine Catch Button
To install all the components listed above, you'll need a pair of roll pin punches and a gunsmithing hammer. An Armorer's Wrench is recommended for installing the buffer assembly (sold separately, see details below).
Grab everything you need from our Gunsmithing Tools.
Easy-to-Follow Install Instructions
First time assembling, or need assistance with certain steps? Check out our in-depth instructional and picture guide. It shows the full LPK assembly with tips and tricks, including tools required and the buffer tube and castle nut install.
Buffer Assembly Sold Separately
Finishing Your Custom .308 Build
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