Talley Manufacturing's Christensen Arms Picatinny Rails are machined entirely from high grade 7000 series alloy and protected with a hard-coat anodizing to 65 Rockwell. The Picatinny Rails have been designed in accordance with the MIL-STD-1913 Pic Rail specifications.
Specifications:

Type
Model	1913 Picatinny Rail
Dimensions
Size
Material	Aluminum
Action	Long
Trigger
Safety
Thread Pattern
Finish
Bolt Type	Picatinny Rail
Hand
Hammer Type
Capacity