Home > Barrels and Uppers
These are parts and builders that we recommend.
Clicking on the link will take you away from Cavity Back Bullets and to their site.


AR15 Performance
High performance AR15 parts for the experienced builder.
We sell the heart of the rifle.

Black Stone Arms
Blackstone Arms LLC is a small custom firearms company founded on quality, accuracy and customer service.
We specialize in building AR platform uppers in 6.8SPC and 5.56.