![[Service] AR-15 Upper Receiver Assembly](https://www.goodessentialgungear.com/wp-content/uploads/2026/08/service-ar-15-upper-receiver-assembly.webp)
Description
As our in-house armorer has shipped out for the season, we have contracted with a trusted local gunsmith for work orders.
The assembly process includes:
- Installation of forward assist assembly and ejection port cover onto a stripped upper receiver (if applicable)
- Installation of gas block & gas tube (will dimple barrel if required; drilling and pinning a gas block is a separate charge available here)
- Checking for gas tube alignment in receiver
- Barrel installation utilizing thermal fitting and alignment when necessary
- Handguard installation utilizing manufacturer-specific barrel nut wrenches, torque values, anti-seize grease
