Tested Krin's to see if it is a display error or if it is truly not applying properly. Test would not be possible without the help of Interstellar Marine, thank you for being my guinea pig.
Test #1Test #1 was using a 'Guardwire' Bolt Pistol on a AmAssault with no damage mods shooting a CalAssault with 707 shield. First trial was to test the BP with no damage mods at all. Shot reduced shield to 500 HP, thus dealing 207 damage. Shot a second time to confirm. Next was to switch to a AmAssault with 3 stacked Krin's. Shot reduced shield to 480, dealing 227 damage. A second shot was taken to confirm. 3 Krin's provided about 9.6% more damage (227 / 207) than with no damage mods by my math.
Results: Krin's is working for sidearms. May be applying less damage than it should, I ask someone with more knowledge of stacking penalties to confirm my results.
Test #2Test #2 was using a 'Templar' Scrambler Rifle on a AmAssault with no damage mods shooting a CalAssault with 707 shield. A fully charged shot was used to ensure accurate results. 1st trial was with no damage mods. Shot reduced shield from 707 to 333 for 374 damage. A second shot was taken to confirm. 2nd Trial was with 3 stacked Krin's on a AmAssault. Shot reduced shield from 707 to 296 for 411 damage. 3 Krin's provided a 9.8% increase in damage by my math (411 / 374)
Results: Krin's is working for Light weapons. I ask someone with better knowledge of stacking penalties to calculate if it is providing the proper bonus.
Test #3Test #3 was using a forge gun on a friendly Sica I called in using a 'Strumborne' Forge Gun on a sentinel gk.0. Only one shot was taken to prevent getting booted from FW. No krin's reduced Sica shield from 2200 to 1076 for 1124 damage. 2 Krin's decreased Sica shield from 2200 to 991 for 1209 damage. Krin's provided about 7.5% extra damage over no mods (1209 / 1124)
Results: Krin's is applying properly. I ask someone with more knowledge of stacking penalties to confirm my results.
ConclusionKrin's is applying extra damage to both sidearm, light, and heavy weaponry. It appears to only be a display error in the fitting screen. It feels like I should see a bigger difference in damage between no Krin's and 3 Krin's, so perhaps it isn't applying fully. In any case, I provide the data gathered in a spreadsheet below for all to see.
Spreadsheet.