Rereading my previous post #5, make that 3+ hours for an Auto 5. Done right, you have to take off the buttstock and forearm; clean the spring tube; clean out the receiver; disassemble the bolt and clean it; clean the trigger group, disassemble it if any of the parts have rust or need real crud removed; clean the barrel; remove the magazine spring and clean the mag. tube; clean the choke, if any. And then put it all back together, test fire, and then clean the barrel again. Yep, at least three hours.
Jim