This is how i did mine...The loctite blackmax should work great for the scope base soft solder would also work....Just be careful some solders arent' great for aluminum....everything cost me about $80 but i am more than pleased with the results...

These are midway item numbers
285564 Williams Fire Sight Rifle Bead .450" Height, .250" Width Steel Blue 3/32" Fiber Optic Red(front sight needs to be a little taller)
330260 Loctite 380 Instant Adhesive Black Max 3 gm
496762 Williams WGRS-Guide Receiver Peep Sight "Ghost Ring" Aperture Aluminum Black
687196 Williams Shotgun Shorty Ramp 12 Gauge 1/8" (.875) Blue
698217 Williams WGRS-H&R Guide Receiver Peep Sight H&R 158, 258 Topper Single Shot Rifles, Ruger Mark 2 Aluminum Black