Picked up a perfect 220ST from a member (thank you sigmonkey). The frames were still made in Germany, and had a slight curve to them, not flat like a pic rail.

Why were they rounded? Was there ever a light that would fit them?

Was looking at it and thought they could possibly be milled flat, but don't want to ruin the value.
This is the gun Ernie Langdon ran in the early 2000's and beat all the 1911 guys in early IDPA

Someone else will come along with more information, but the early P220STs’ attachment rails were for a proprietary compensator. Long ago someone here posted his plan/idea to machine the rail off—for aesthetics, I suppose—but I don’t recall reading that he ever did it.

It would be good to see a picture of that classic.

I think this is not the earliest rail. My 2 P220 ST guns had the first rail. Maybe from around 1995?

That's the same proprietary SIG rail that is on all the metal frame P-series railed guns, except the Picatinny rail that is on the Combat and the MK25.

The one that sigfreund mentioned is the different and smaller rail that is on the P220 Sport to accommodate the separate compensator or weight.

quote:

Originally posted by 12131:
That's the same proprietary SIG rail that is on all the metal frame P-series railed guns, except the Picatinny rail that is on the Combat and the MK25.

The one that sigfreund mentioned is the different and smaller rail that is on the P220 Sport to accommodate the separate compensator or weight.

Ah, yes. Thanks.

I have a first generation P220ST as well. They used the P220 Sport frame and proprietary rail.

This is the early style rail that is frankly just...very unsightly.