Quick question, are all 9mm 3rd Gen hammers the same? The reason I ask is if I wanted to replace the small hideaway hammer that came on the 6904 with more of a semi-bobtailed hammer or even a full hammer, would it fit?

The DAO hammers are obviously not compatible. All of the 3rd gen spurred hammers will function.....like the hammer for the 5904, for instance. These MIM hammers are still available. New forged ones are harder to find.

Hammer Assembly, Spurred, MIM, Blued w/o Half Cock Notch) Gun Parts | 357910A | Numrich Gun Parts

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Ret. LE, FA Instr, S&W Armorer

Numrich gun parts has a 6906 spurred hammer assembly that I believe will work. You might need to use your old stirup.

The hammers, with a few exception (usually the DAO guns), will usually interchange and they don't necessarily have to be from a 9mm... the same ones are used across the 3rd gen pistol line.

I changed out the spur less hammer in my 4516-1 with a MIM spurred hammer for a 4006... just need to drive out a roll pin to swap the hammer spring stirrup, since the one on a spur hammer is longer.

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Conrad
SWCA #1830 SWHF #222

Thanks for the quick responses. If I wanted to put a spurred hammer on a 6904, would I need the one with or without the half-cock option?

You want the hammer without the half-cock notch.

The half cock notch was for the 1st gen guns....they have no firing pin block.

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Ret. LE, FA Instr, S&W Armorer

Thanks guys, that's why I like this place, great experience and knowledge!

Did this to 2 of my guns. 3913, & 4516. The rule of thumb is mim hammer with mim trigger, & milled hammer with milled trigger. GARY

Great point. Wonder how hard these are to find nowadays...

The one for my 3913 I found here. I put out a WTB, & got a reply right away. $20. A few months later, when I got my 4516, I contacted the seller, but he had no more. I looked on E-Bay but they were all $50+. I was not going to pay that. But eventually I found one on E-Bay [brand new], & got it for $30. Both were stainless milled. GARY