About 250-300*f should break down blue loctite.
Soaking it with Kroil will take time, but it will work. Put the Kroil on the bottom of the dovetail slot also & let it go at the loctite from both ends of the screw, speed it up a bit.
NRA Endowment Member, NRA Certified Instructor for Rifle & Pistol, Illinois State Rifle Assn. - Life Member, GSSF Life Member,N.R.O.I. level I, IL Glockers #34
G: 19,20(x2),21,22,23(x2),24,27,29,34,35 & 36 (still counting)