Arm or Ally has teamed up with Aero Precision and Weapon Works to bring you five different cerakoted M4E1 and M4E1 Threaded Custom Builders Sets. Be sure to check out the “Finish Your Build” options for a selection of parts at deep discounts when purchased with one of these sets.
Each set comes with a matching upper receiver, lower receiver, and 9" or 15" handguard in the Enhanced or Atlas style. Need matching furniture for your builder's set, check out the matching selection of Magpul parts. The following patterns are available:
Arm or Ally also stocks one of the best selections of barrels, bolt carrier groups and triggers to help complete your custom build