I tried the Glock +2 extensions on my GAP magazines with mixed results. On my G38 magazine, it did give me 1 extra round capacity (9 rounds) but on my G37 magazine I still could only get 10 rounds in. What has been you Bull Dawgs' experience with magazine extensions on your GAP mags. Does anybody use Pierce or another brand of extension with success? Wanna kill these ads? We can help!