I know this might sound trivial but the older pistol will have a roll mark HK on the slide and the newer one will most likely be laser etched. Some say the laser etched has a tendency to rust.
HK - No Compromise
other example of "over-engineered" is the .40 and 9mm basically share the same frame specs per model . the 45acp frame is slightly larger and more robust . german engineering at its finest .
I read somewhere that you can get a free upgrade if your older model usp still have the older parts like non-captured recoil spring and rod? Maybe the firing pin and firing pin block? If that true?
My friend told me.
Pencil does not misspell, people do.
Gun does not kill people, people do.
And the sights, my KD and KF have the white dot insert through from front to back , my BD just a dot in the front. Certainly the early sights are better and from what I see the white dot is a rod that can be replaced. When was this change made?
An extra part if you're converting to LEM.
I have old and new.
IMHO they are all good
Below is a more complete list of changes over the year.
Changes made to the USP series:
• 1994 (KE): Reduced the slide weight by 1.1 oz
• 1994-95 (KE-KF): Changed to a polygonal rifled barrel (Prior barrels were standard land and groove)
• 1994-95 (KE-KF): Changed trigger transfer bar
• 1994-95 (KE-KF): Changed recoil guide rod to a "captured spring version"
• 1995 (KF): Changed trigger mechanism
• 1995 (KF): Changed frame to allow new-design hammer axle and LEM conversion
• 1995 (KF): Changed hammer strut
• 1995 (KF): Changed one-piece catch to two-piece catch
• 1995-96 (KF-KG): Added rubber spur to hammer
• 1995-96 (KF-KG): Changed angle on slide lock
• 2000 (AA): Added locking feature to hammer strut support (lanyard safety)
• 2001 (AB): Converted captive recoil spring retainer from c-clip to machined end on USP Compacts (not USPf)
• 2005 (AF): Redesigned firing pin, firing pin block, and firing pin block spring
• 2005 (AF): Changed to longer catch and new hammer with the cut-out for the new catch