The M8541 is a S&B 3-12X50 PMII L/P with the Premier GenII Mildot reticle installed in the first focal plane. The first M8541's that were issued out had a standard double turn MRAD turret with a BDC engraved for M118LR and Mk211. This was changed a short time later to the MTC MRAD turret that's seen today. The rear ocular on M8541's are also marked differently than standard production S&B 3-12's.