![[Service] AR-15 Upper Receiver Assembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/960x454/products/1370/1941/_dsc0329_2__94833.1743743088.jpg?c=1 "[Service] AR-15 Upper Receiver Assembly")
Description
As our in-house armorer has shipped out for the season, we have contracted with a trusted local gunsmith for all work orders.
The assembly process includes:
- Gauged inspection of lower receiver
- Installation of small parts
- Alignment and Installation of receiver extension
- Torqued castle nut to manufacturer's specs or Mil-Spec TDP
- Double staked castle nut, finished with liquid cold bluing
![[Service] AR-15 Upper Receiver Assembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/1920x1920/products/1370/1941/_dsc0329_2__94833.1743743088.jpg?c=1&imbypass=on "[Service] AR-15 Upper Receiver Assembly")
![[Service] AR-15 Lower Receiver Assembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/1920x1920/products/1370/1940/01_1_1_1__99193.1743743088.jpg?c=1&imbypass=on "[Service] AR-15 Lower Receiver Assembly")
![[Service] AR-15 Upper Receiver Assembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/120x120/products/1370/1941/_dsc0329_2__94833.1743743088.jpg?c=1 "[Service] AR-15 Upper Receiver Assembly")
![[Service] AR-15 Lower Receiver Assembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/120x120/products/1370/1940/01_1_1_1__99193.1743743088.jpg?c=1 "[Service] AR-15 Lower Receiver Assembly")
![[Service] AR-15 Front Sight Base Conversion to Low Profile Gas Block](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/600x600/products/333/622/fsb_grind__55316.1740467705.jpg?c=1 "[Service] AR-15 Front Sight Base Conversion to Low Profile Gas Block")
![[Service] AR-15 Upper Receiver Disassembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/600x600/products/335/626/upperdis1__49133.1743744260.jpg?c=1 "[Service] AR-15 Upper Receiver Disassembly")
![[Service] AR-15 Upper Receiver Disassembly](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/600x600/products/335/625/upperdis2__25498.1743744260.jpg?c=1 "[Service] AR-15 Upper Receiver Disassembly")
![[Service] Front Sight Base Pinning](https://cdn11.bigcommerce.com/s-akcawsxpxw/images/stencil/600x600/products/336/627/gunsmithing_1__55122.1740467706.jpg?c=1 "[Service] Front Sight Base Pinning")