Although sufficient I'd like to upgrade the gauge on my Daystate Regal. I'm looking for one that the increments are spaced out and use 70-80% of the gauge's face. I removed it yesterday to take a look at the threads at it appears to be the 1/8BSPP thread with a shoulder that seals with a doughty seal. The OD of the factory gauge is 23mm. The hole through the stock is just under 1". T3P found one that's slightly better but still not what I'm looking for. FX gauges are nice but the threads on the one I have are slightly different I think and it don't have the sealing shoulder. Here's what comes on the Regal. Any other Daystate shooters have different gauges.
Jimmy
http://i1122.photobucket.com/albums/l540/kingji01/Daystate%20Regal/IMG_2851_zpsii4nmtp7.jpg
http://i1122.photobucket.com/albums/l540/kingji01/Daystate%20Regal/IMG_2850_zpsubpw7etx.jpg
Jimmy
http://i1122.photobucket.com/albums/l540/kingji01/Daystate%20Regal/IMG_2851_zpsii4nmtp7.jpg
http://i1122.photobucket.com/albums/l540/kingji01/Daystate%20Regal/IMG_2850_zpsubpw7etx.jpg