Veriforce Tactical prides itself on having custom AR 15 Uppers for sale that is unique to the product line that we carry. Most of our AR15 upper receivers are custom made to order or pick one out below that we have in stock and ready to ship. Most AR15 uppers ship 1-2 business days. We also custom cerakote our upper handguards in Magpul flat dark earth. If you are looking for something different take a look below to see what we offer. Everything is built by us and headspaced to you are ready to shoot when you get your AR15 upper receiver. Our M4 uppers are 5.56 or .300 blackout calibers.