The beancounters at Remington had Remington engineers design a new integral safety lock for the entire Remington line using a cheap, sheet metal "key" that was shaped like the letter "J". On the Remington 700 line, this new "safety device' was installed in the bolt shroud. In the shotgun lines it was installed in the trigger guards where the old push button safety went. The problem was the hole left for the key allowed all kinds of foreign matter to enter the firearm. It was possible for the "safety" to be partially engaged by foreign objects while beating through the woods and if you ever lost/forgot the "key" you were basically left with an inoperable firearm until you could obtain a replacement. While a life-long fan of Remington, I refused to purchase another Remington product while they were actively plugging this new "advance."
Complaints, letters of protest and drops in sales across the board finally forced the powers that be that maybe Lawyers weren't the best guys to be designing "safety" devices for their firearms. The "J"-Lock was abandoned a couple of years ago and good riddance! Aftermarket safety buttons and bolt shrouds can be purchased to replace the necessary parts on any firearms blighted with that abortion we now know as the J-Lock.