Gun Nuts® Ambidextrous Sporter Lower Parts Kit

Features a notched hammer and ambidextrous safety.

Combine the best of old-school ARs with the ergonomics of a modern parts kit with the Sporter Ambi LPK from Gun Nuts. Features an original notched hammer, for compatibility with unshrounded bolt carriers and old-school uppers from Colt, Bushmaster, and military surplus rifles.

Also features ambidextrous safety selector lever for right- and left-handed shooters.

Mil-spec fitment guarantees compatibility with virtually all AR-15 lower receivers, including 80% lowers and retailer stripped lowers.

Sporter Lower Parts Kit: What's Included

This AR-15 Lower Parts Kit includes all components required for assembling your AR-15 stripped lower receiver, minus a buffer tube kit (sold here).

• Bolt Catch
• Bolt Catch Plunger
• Bolt Catch Roll Pin
• Bolt Catch Spring
• Buffer Retainer
• Buffer Retainer Spring
• Disconnector
• Disconnect Spring
• Notched Hammer
• Hammer Pin
• Hammer Spring
• Magazine Catch
• Magazine Catch Button
• Magazine Catch Spring
• Pistol Grip (A2 style)
• Pistol Grip Lock Washer
• Pistol Grip Screw
• Pivot Pin
• Pivot Pin Detent
• Pivot Pin Detent Spring
• Ambitdextrous Safety
• Safety Detent
• Safety Detent Spring
• Takedown Pin
• Takedown Pin Detent
• Takedown Pin
• Detent Spring
• Trigger
• Trigger Guard
• Trigger Guard Roll Pin
• Trigger Pin
• Trigger Spring

LPK 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 AR-15 Build