Products included: 1x Complete lower with super safety installed, 1x Mp5 slip trip Complete MP5k lower pre-installed FCG, and super safety. Purpose-built lower specifically around the Super Safety. The outer housing is polymer, while the internals and structural components of the lower are reinforced by Steel. The lower is built to handle thousands and thousands of rounds and repeatedly withstand heat cycles. *By ordering the product, you understand and agree to the production time frame.