Finally got to test the JP Springs and second gen mags. Bottom line: very pleased with the springs and the 15-22. Shot about 400 rounds of CCI, Win, and mostly Rem bulk pak using both 1st and 2nd gen mags long mags as well as the new shorties - zero failures of any kind on my DTX. Here is a hand held, factory iron sights, 30 round group at 25 feet at an indoor range, using the "dreaded" Remington GB's. Light at the 50 foot distance was too dim for my old eyes.

http://i122.photobucket.com/albums/o...e/DSCN0551.jpg

It would have been nice to have had a 25 round mag and simply emptied one mag at the target. But here in California I had to load up three 10 rounders.

I don't know if it makes any difference, but I use high tech gun grease on the bolt rails, CLP on everything else. I am considering going to EEZOX, but still use grease on the rails.