There's no such thing as a foolproof mechanical safety on any weapon. Yes, the cross bolt or transfer bars come pretty close The only safety that really counts is the one between your ears. Knowing your manual of arms for everything in your gun safe and then some, being absolutely vigilant whenever you handle any firearm for any reason and following the rules established over many years will probably eliminate 99.99 percent of any negligent discharges. It's the best we can do. We're imperfect human beings and stuff happens. In my 60 years of shooting I have had only one negligent discharge and that was testing a semi-auto pistol I had just repaired and was pointed in a safe direction. No harm done except to my pride, thank God. As far as modifying / eliminating a factory safety, I can't recommend it. But if you have to just remember whatever happens thereafter is on you and ONLY you. Sell a modified gun to another person and something happens, in this litiginous age you will be held accountable. Just sayin'