This is the service to get your upper and bolt milled for the SAS-M8. When you buy this service, we will send you a label to send in your upper and bolt for milling. If you do not want to send your Bolt for milling and would like one thats already been cut, we sell those separately as well.
If you have any questions or concerns, feel free to give us a call or reach out to us at Sales@FSGCKS.com and we will do our best to answer your questions.