MBX spring/followers, Henning base pads with CZ nickel plated mags. Ran set of 4 April thru October over 20 local matches, 2 sectionals and 1 area plus practice weekly. Ran flawless 24+ plus 1 thru Shadow 2. 25 F - 90F temps. Rune had feeding issues. Initially bought one of each rune and mbx to test. No break in period for MBX got 24+ 1 first use. Had issues with rune in another platform never able to get 24+ 1..