For building uppers we highly recommend using a rod type tool (reaction rod) which engages the barrel extension lugs. These type of tools are used here, at BCM, for assembly and take assembly forces off of the upper. These are available from a number of companies including Midwest industries, Geissele, and Wheeler engineering.
Shop BCM® AR-15 upper receiver parts including our upper receiver assembly, forward assist assembly and ejection port cover assembly.
We carry other AR-15 parts including barrels, suppressors, flash hiders, compensators, sights, gas blocks, gas tubes, charging handles, bolt carrier components and more.
If you would like to shop complete AR uppers we manufacture many options for the AR-15, M4, and M16.
