12-29-2018, 12:54 AM
I got the very same upper for Christmas that the OP got. It looks good and we will see in the very near future hope well she shoots. I did discover that the M-Lok openings are out of spec. The spec calls for 7mm wide slots... mine measured anywhere from 6.55mm to 6.75mm. I could not get any of the M-Lock attachments to fit. I sent an email to Bear Creek warranty. We will see what they say and how they handle it.

