Springfield 1911 question

[kenacp]

Can someone tell me if the small pin that keeps the plunger cap and hammer spring in the mainspring housing is used on Springfields with the safety lock? I took my friends loaded model apart for cleaning and no pin. Reassembled it and it seems to cycle  OK. Is it needed? Thanks

[safari]

There is no pin in the new ILS mainspring housing. The key lock of the ILS takes the place of the pin.

I did not like the heavy trigger , the arched mainspring housing, nor the ILS gizmo, so the first thing I replaced on my Springfield Mil-spec was the mainspring housing, and had to also buy a mainspring, mainspring cap, and the pin. None of the ILS parts will function properly in a standard 1911 housing.  After replacing with parts and springs from Wilson, a new 4 leaf sear sping from Brownells, trigger pull was drastically reduced, and now is a shooter I love.