C10 was a C7 variant that shot .22's.curtton said:lawrence: well said, couldnt agree more.
ontgunner: what the heck is a C10?
We hosted a bi-athalon in Pet the winter of 93/94 and they had a few there.
This is all I could find on the 'net about it.
http://yawiki.org/proc/Diemaco_C7
Other Diemaco variants
Diemaco's C7/C8 family is completed with two marksman variants, the C7CT and C8CT, with CT meaning Custom Tactical. These variants are designed to provide accurate engagement up to 600 meters, while providing system commonality to other fielded weapons. They have two-stage match triggers and weighted stocks to counterbalance the heavy 20-inch or 16-inch free-floating barrel.
Diemaco makes a training version of the C7 named the C10. It fires .22 Long Rifle, but is only capable of semiautomatic fire. The stock and lower receiver are one piece.