Best to ask a gunsmith to show you how.
IMHO, best left to a gunsmith to remove it.
When you open up the cylinder you should find it on the crane and also on cylinder at the swivel
there are no safeties on revolvers. keep cylinder under hammer empty or keep cylinder empty. then gun is safe....................
your colt cobra was made in 1968.
left side of revolver there is a small latch just behind the cylinder. pull the latch to the rear at the same time open cylinder
If the Colt cobra's serial # is 25400LW, it was produced in 1953.
What letter or letters does your Colt cobra have? From 1950 to 1977 the Colt cobra had letters either after or before the serial number.
Your colt cobra was made in 1966.
Colt cobra 116945LW is 49 years old.
Your colt cobra dates to the year 1969.
You will have to call Colt.
That Colt cobra was made in 1976.