Not sure what you are talking about. E-Z FIT is their trade name for all of their grip safeties and refers to the standard radius, either .250" or .220" depending on application. Previous grip safeties had an "odd" contour that was a constantly changing dimension as you moved around the clock along the mating surface (think Wilson 298 or the old Clark and Safari Arms). The E-Z FIT has a standard radius all the way around which makes fitting much easier. .220" is usually recommended for Springfield Armory and can be used for an overcut frame to avoid welding/refitting. Last I noticed, the price was the same for all versions, too. The other variation is primarily in the S70/S80 versions where the trigger blocking arm is relieved for the S80 parts. They also offer a short GS for the short gripped Para's.
I'm looking at page 99 of catalog #64. Not sure what you are reading. The difference is as I noted above. The 849-009-127, .220" is for Springfields and the 849-007-172, .250" is for Colts, etc. The purpose is to get a better fit to the frame contour after cutting the frame tails/horns/extensions/whatevertheheckyouwannacallit for the GS.
The two letters at the end of the part number are irrelevant. I have no idea why Brownells puts them there. And I have no idea why the Brownells price is different for the two when the S&A price was the same last time I looked.
I'm sorry for creating confusion. Poor wording on my part. I corrected my post to reflect the .220 was for the S.A. and the .250 is for others such as Colts.
The difference in the product descriptions along with the price doesn't make sense to me.
I believe the EZ Fit idea is that their grip safeties require less grinding to fit the frame. This only works if the frame has symmetrical contours on both sides. I know this from experience!
??? Milling/grinding/filing should be base on the use of a jig to cut precisely with relation to the pin hole. I've seen plenty that were not symmetrical to the hole, but contouring to fit the GS was unaffected. Were you trying to fit without the jig?
I have fit a bunch of the EZ Fit safeties with nice results. Here's a pic of a .250 radius I did on a Remsport build.
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