was this the open red dot or the red dot tube scope? The reason I ask...I've had a tru glo open redot on one of my 835's this season with no issues at all. It's probably taken 2 doz. shots with win xtended 3.5" and hevi 2 1/4 oz 3.5" shells this years. I like it as good or better than the mueller on my other 835. truglo has a lifetime warranty and will take care of you. I've had numerous scopes on this 835 including simmons prodiamond, burris red dot and FF2 and this open red dot has proved the best on this setup