Update on the legality of Rectangular apertures in competition

Spring 2011.  Rectangular apertures have been declared legal for NRA and CMP use in Service Rifle.  This includes all XC, EIC, P100, NTI, NTIT, and other matches conducted by NRA or CMP.

Rectangular apertures are not legal for Lever Action Silhouette shooting, pending review by the rules committee in November 2011.