The KAK Industry AR-15 Basic Ambi Lower Parts Kit (brand part no. AR15-LP-KT-03) is built around an ambidextrous selector and the basic small parts of an AR-15 lower. KAK Industry describes it as everything you need for your custom build and nothing you do not. It gives builders the bolt catch kit, magazine catch kit, pins, detents and springs in one package. It suits a custom lower where the trigger and grip are chosen separately.

Key Specifications

• The kit has an ambidextrous selector with its detent and spring, so the safe and fire lever works from either side.
• A bolt catch kit is included, covering the bolt catch assembly.
• A magazine catch kit is included for the magazine release.
• The takedown pin and pivot pin each come with a detent and spring.
• A buffer retainer pin and spring keep the buffer secured in the receiver extension.
• Hammer and trigger pins are included to mount the fire control parts you choose.
• Install notes call for blue Loctite and 5 to 7 in-lbs of torque on the selector screws, or hand tight.

Frequently Asked Questions

What does the basic ambi kit include? It includes a bolt catch kit, magazine catch kit, takedown pin with detent and spring, pivot pin with detent and spring, buffer retainer pin and spring, an ambidextrous selector with detent and spring, hammer and trigger pins, and hammer, trigger and disconnector springs.

How do I install the selector screws? KAK says to degrease the ambi selector screw threads and apply blue Loctite, then torque the screws to 5 to 7 in-lbs or hand tight.

Is the selector ambidextrous? Yes. The kit comes with an ambidextrous selector, detent and spring.

Buy the KAK Industry AR-15 Basic Ambi Lower Parts Kit

This is a no-frills way to finish a custom AR-15 lower with an ambidextrous selector. Order it from our Lubbock, Texas gun shop for fast shipping, and see more AR lower parts kits to complete the build.