Sorry to hear about the ASI Ext mag. release. I just installed one from Lee Hadaway at "The Arms Room". My Ruger mag release measured .470" from the top of the hole to the top of the latch. The Hadaway Release measured .480" just like he had posted. Basicly they still all work, latch, and feed perfectly. It does look well made. My western mags had a problem with not latching with the bolt closed with the old release, no diff. The Western mags. latch with the bolt open with either Release.
You might want to have the gunsmith grind the new latch to match your old latch so your mags will fit. Or send it back.
You might want to have the gunsmith grind the new latch to match your old latch so your mags will fit. Or send it back.