About Phase 5 Builders Bin

Due to an Overwhelming number of requests from small companies and serious AR15 builders, Phase 5 Weapon Systems Inc.® is Proud to introduce our newest Web Division!

The Phase 5 Builders’ Bin™

In this popular Phase 5 Web Division you will have access to our personal inventory and stash of OEM parts, OEM repair parts and hard to find small spare components that you can never have enough of. This Division will constantly rotate new relevant components in and out of the Builders’ Bin based on ability to offer the parts when we have a sufficient amount of the (part/parts) machined and in the parts bin. We hope that you will find these parts and their availability extremely helpful!