Cons Qualified, Modified, and Augmented...
Cons
1. Good for about 50rds before jamming.
2. Don't loose your gas chamber scraper (need to clean chamber after 50 rds)
3. Mags are hard as hell to find now.
4. Parts are even harder to find.
5. Area about the triggers get a little hot after 100 rds. May burn your trigger finger.
6. Rust bucket.
7. HK stamped on side of fiream.
1. I use dry Teflon lube on the gas piston & cylinder, thousands of rounds without jamming. Avoid over lubrication with fluid lubes.
2. Scraper is useful but not necerssary and can be replaced with an aftermarket scraper (see postings at Park Cities Tactical: the Cult of the P7.) A .270 bronze bore brush works fine.
3. Mags for the M8 are out there but may be hard to find.
4. Parts can be obtained from HK, Numrich Gun Parts, and via other 'Cult' members.
5. Yup even the P7 M8 with the heat shield gets hot. Buy a second P7 or shoot something else while the heat dissapates.
6. Rusts if you don't take care of it, like any steel gun. I store my M8 and M13 in siliconized socks after assuring a complete wipedown with Breakfree CLP or CorrosionX. No rust at all.
7. HK stamped on the side is a con? Would Mattel be better?
8. Dry firing without a dummy cartridge appears to shorten the life of the firing pin bushing.
9. Drop safety springs seem to require common but not frequent replacement.
10. A bitch to reassemble if you proceed beyond factory recommended field stripping.
The manual arms is definitely different in that you have to squeeze the cocking lever to: 1.) release the slide lock or 2.) cock the pistol or 3.) or both at the same time. Since the shooter should have a firm grip on any gun to shoot it properly, the squeezing is a natural thing to do and the gun is consequently very quick to 'present' ready to fire using one hand without moving fingers and thumb from firing position.
Holding the cocking lever back requires very little pressure and repeat shots can be very quickly accomplished. All shots are single action. Once the cocking lever is released, the gun cannot be fired.
The different manual of arms has saved at least one LEO life because the bad guy couldn't figure out out use the gun he'd wrested from the LEO (See Massad Ayoob).
Here's a link with a huge collection of material about
the P7 in Print