I just bought a “new” Remington Model 11, made in 1947 or ‘48, to go with my 1942 vintage 11 and ’89 vintage Auto 5. It is obvious Remington never intended the Model 11 to be detail stripped. Both mine were missing the groove the Auto 5 has on the right side of the receiver to drive out the locking latch pin. I need to remove it to replace the locking block latch with the one for the two piece carrier to get the speed load feature of the Auto 5. I have installed those parts in my older 11. Now I will put it in this one, too.
I will use the most appropriate one with an extended mag for 3-gun.