Jeff sent us a photo showing him having some weekend fun with his MAC-10. The M-10 has a Lage Manufacturing MAX-10 upper receiver with EO-Tech sight. The MAX-10 upper reduces the rate of fire from the notoriously high 1,100 RPM of the regular M-10 upper to a more manageable 750 RPM. It also features a side cocking and reciprocating charging handle and full length rail.

Thanks Jess.