Why the rubber on the spur of the hammer?

[Brian1979]

So I have seen this talked about most recently in a thread where Rogard accidentally damaged this part during finishing. I didnt realize mine had it as well and I have the LEM kit for my USP.

So why is it there and how secure is it?

Why not make the hammer all metal?

[Kochaholic]

You reengineered the roll pins and you can't figure out the rubber spur? And I thought you had moved on to perfecting the internals! Ok, just kidding. I could tell you its because the hammer has no slip and a much better grip or I could say it was so it does not hurt so much, or wear out your clothes but, the real reason is, it makes the drop test. You know, you can drop them out of helicopters like us tactical guys do and they will not go off.

[Brian1979]

So it was a way to lighten the hammer as well as absorb impact to pass a drop test?

That is odd because the Firing pin safety block is in the way of the Firing pin so I cant see how it ever could go off with out a trigger pull.

Haha on the roll pin comment. Being a bobbed hammer I couldnt see the point in the rubber being there for grip. This isnt a 1911 where you ever touch the hammer so no need for increased grip surface, right?

If they meant to lighten the hammer it would have looked cooler to make a skeleontized hammer like on a 1911.

[G3Kurz]

So I have seen this talked about most recently in a thread where Rogard accidentally damaged this part during finishing. I didnt realize mine had it as well and I have the LEM kit for my USP.

So why is it there and how secure is it?

Why not make the hammer all metal?

The primary reason for the rubber hammer inserts in HK pistols was to better pass NATO and US drop tests - first used for the heavy MK23 MOD 0 for US Govt testing.

G3Kurz

[SIGtrarian]

So it was a way to lighten the hammer as well as absorb impact to pass a drop test?

That is odd because the Firing pin safety block is in the way of the Firing pin so I cant see how it ever could go off with out a trigger pull.

Haha on the roll pin comment. Being a bobbed hammer I couldnt see the point in the rubber being there for grip. This isnt a 1911 where you ever touch the hammer so no need for increased grip surface, right?

If they meant to lighten the hammer it would have looked cooler to make a skeleontized hammer like on a 1911.It has nothing to do with lightening the hammer. How much would that tiny bit of steel weigh anyway? Have you seen the SIG P6's being imported with the small hole and slot in the hammer spur? Same principal, different method of execution. An unnamed (at least to me) German police agency required the small amount of extra shock absorption afforded by the rubber tip/hole and slot.

[Brian1979]

Hmm thanks for the info. I couldnt figure out what it does or why it was there but I guess in some small way it does its job.

[usp9c]

Just curious, how well does it stay on? Has anyone had it come off?
Thanks.

[Tiger 2 Tank]

It's rubber, it'll deteriorate by time like all rubber does. I wish they hadn't put the rubber on it, but they did so I'll live with it. Hk likes rubber parts for some reason way too much. The older model USP's don't have rubber ended hammers which I like better. Wish they kept those hammers instead.

[AviatorDave]

It's rubber, it'll deteriorate by time like all rubber does. I wish they hadn't put the rubber on it, but they did so I'll live with it. Hk likes rubber parts for some reason way too much. The older model USP's don't have rubber ended hammers which I like better. Wish they kept those hammers instead.

True, unless it's not really rubber.

I suspect it's not rubber but a more modern soft polymer. It may still wear out, but they don't just crumble away with time like typical rubber does. It it was real rubber, I'd think cleaning solvents and oils would do bad things to it very quickly.

[Kochaholic]

Synthetic rubber (Neoprene)

[Brian1979]

LOL, your rubber fell off.

[AviatorDave]

Synthetic rubber (Neoprene)

I would have guessed either neoprene, silicone, Nitrile or some other elastomer. Many of them can easily handle the solvents and heat.