The White Label Armory WLA-PAC-7004-05 is a 5-pack of steel castle nuts with a black phosphate finish for AR-15 and AR-10 receiver extensions. The castle nut locks the buffer tube and end plate to the lower receiver. A five-pack covers several builds.
- Brand: White Label Armory
- Fits: AR-15 and AR-10
- Part: castle nut
- Material: steel
- Finish: phosphate (black)
- Quantity: 5
- Manufacturer part #: WLA-PAC-7004-05
- UPC: 810155161026
