The Montec does not have replaceable blade, but the striker does. I have never heard of G5 Montec Stingers, so I am assuming that you are talking about the strikers. If that is the case, I agree with you because I have used them in the past and they have proven very effective. The only problem that I have with them is the price. The G5 broadheads are twice as expensive as the Wasp broadheads, which perform as well or better.