My buddy and I were out at the range earlier today mostly testing out some new cold weather gear (the temp was about -32 degrees). After about one mag through his SCAR-H, the reticle on his TA33 3X ACOG was no longer lit up, it was just a black triangle. If we tilt the gun from side to side it would sort of come back for a brief second, but that was it.
He's going to call Trijicon on Monday, but until then, has anyone ever heard of this? Is it possible something in the optic froze up?