colonel

Good morning one and all. I called Jackfirst to see if they had oem hammer, sear and disconnector for the 1911. The lady that answered said yes we do they are in the blue. I asked are they mim or barstock? She said well that is what we have left and she would not deviate from that. So I decided to take a chance and ordered the three parts for about $75. My question after the fact is that from what information little as it is that is it that Jack First bought out some mil-spec colt parts and maybe that is what they have left? I would like to know if any of you have ever heard about their colt iginition parts that they sell. Thank you.

dfariswheel

If the sear and disconnecter are genuine Colt parts they will likely be sintered steel, which is what Colt has used since the 1970's.
Sintered steel is an early form of MIM. Colt has had no problems with these parts and they've been used for 40 years or so, so any problems would have shown up by now.
Unlike some current makers of MIM parts, Colt does them right.

The hammer will be bar stock, which is what Colt has used for a long time.

If you demand a bar stock sear and disconnecter, order them from Brownell's. They sell bar stock parts made by several top makers. Colt no longer makes them.

To ID sintered steel Colt sear and disconnecter, look for tiny shallow mold ejector pin marks on the parts.

Truth: The Colt sintered steel parts are first rate and don't have the MIM reputation.

pistolwrench

Genuine Colt sears and discos are nickle plated, they are NOT blue/black.
Powdered/sintered metallurgy.
Excellent parts.
Good supply at Brownells.
Or Midway
Or Gil Hebard

colonel

Thank you both on my new knowledge of colt metallurgy in the past. I guess what it boils down to is that if Jack First is honest selling those parts as genuine colt parts. Only one of you states nickel plated I am aware of that at least in those companies mentioned that they are nickel plated. Could it be that they are nickel plated as of a recent time frame?

pistolwrench

col,

There is a LOT of advice/knowledge on the internet.
Some of it is correct.

I'd suggest doing a little research on the individual offering
the advice.

colonel

Thank you I will do that. Again thank you for your input.

Alabaster

dfariswheel

Unless they've changed since I retired, genuine Colt sears and disconnectors are bare carbon steel, not nickel plated.

Since they are as-done heat treated parts they often have a slight amber or bronze color.