The DPMS M4 Upper in 5.56, 16-inch with a Phosphate Finish (brand part no. DP51655109547) is a complete, semi-automatic AR15 upper chambered in 5.56 with a 1:7 twist rate and a durable phosphate-finished barrel. A 13.5-inch M-LOK handguard covers most of the barrel’s length, giving a builder plenty of real estate for lights, grips, and other accessories. The 16-inch barrel length keeps the build in standard rifle configuration for full velocity from 5.56 ammunition. It bolts onto any standard mil-spec AR15 lower to complete a full-length rifle build.

Key Specifications

• It is chambered in 5.56.
• The barrel measures 16 inches long.
• It is finished in phosphate.
• It uses a 1:7 twist rate.
• It includes a 13.5-inch M-LOK handguard.
• It cycles as a semi-automatic action.

Frequently Asked Questions

What lower does this fit? It is built to bolt onto any standard mil-spec AR15 lower receiver.

What handguard does this come with? It includes a 13.5-inch M-LOK handguard covering most of the barrel’s length.

Built by DPMS and sold in our AR15 uppers category, it is ready to bolt onto a mil-spec lower.

Buy the DPMS M4 Upper – 5.56, 16in, Phosphate Finish

Upgrade your build with the DPMS M4 Upper – 5.56, 16in, Phosphate Finish and get the fit, finish, and function serious shooters expect. Backed by our team at Schaefer Defense, Order it now from our Lubbock, Texas gun shop and it will ship as soon as it’s ready to go out the door.