This is a Sig Sauer Mount known as the ALPHA3, model SOA30007.
SIG's proprietary steel alloy ALPHA3 Scope Mounts are machined with an exactness that is both strong yet ductile that allows the rings to form around a riflescope" yet will not damage scope under proper installation. The steel rings are epoxy powder coated to prevent oxidation and resist gun oils" cleaning solutions" and outdoor exposure.
Features:
Steel Weaver-style clamps
Covered by SIG SAUER's Infinite Guarantee
Torq To Rail (1/2in Nut): 65in/lbs
Torq to To Scope (T15-TORX): 25in/lbs
