Ordering the parts and actually assembling a customized rifle can be one of the most enjoyable parts of being a gun owner. When you look to get started, you might consider working with a complete upper rather than starting from scratch, as this will help you get all of the necessary parts in one place. If you are looking for a great foundation to start building your rifle on, the PWS DI-10 223 Rem / 5.56 NATO 10.75″ Complete Upper Triad is an excellent choice.
Featuring a match grade 10.75” barrel, every part of this upper way built to perform. It includes an enhanced buffer tube that eliminates carrier tilt and a bolt carrier group that is precision made to allow for the smoothest cycling rate. With a free-floating aluminum rail design, it allows for a more ergonomic grip profile while still providing enough space to fit any accessories you might need. This is made to fit with any MilSpec lower you might intend to use.
When you are looking to build a rifle that is truly comfortable in the field, this is a great place to start with your design.