MIL-C-48550, MILITARY SPECIFICATION: COLLIMATOR, INFINITY AIMING REFERENCE - M1A2 (15-AUG-1978) [S/S BY MIL-DTL-48550A]
MIL-C-48550, MILITARY SPECIFICATION: COLLIMATOR, INFINITY AIMING REFERENCE - M1A2 (15-AUG-1978) [S/S BY MIL-DTL-48550A]., Reactivated after 16 August 2012 and may be used for new and existing designs and acquisitions. This specification covers the Infinity Aiming Reference
Collimator, M1El which consists of a collimator with integral
tripod and cover. This equipment is referenced throughout this
specification as "Collimator". The reticle in this collimator
is radioactively illuminated.