Originally Posted by Jim S.
One more thing I forgot about.
Can the ILS be eliminated simply by replacing the mainspring housing and related components?
Yup, it sure can. It's a very easy swap out too, total cost will be around $50 to $60 for the MSH and assorted parts. I've done it several times now.
Some say replace the hammer strut while you're at it because supposedly the stock hammer strut is shorter to work in conjunction with the ILS. In my experience though that's been bogus info about the hammer struts, the stock ones work fine with the replacement MSH and parts. I went ahead and replaced my hammer strut on one of my Mil Specs anyway for something more durable just because I wanted to.