- Gain +1 round (+12.5% capacity)
- Make 8+1 mags into 9+1 mags, long enough for people with wide hands to get all four fingers on the grip. (Huge increase in control.)
- Make short 7+1 mags into an improved 8+1 mags (better feel, more compact, no plastic collar)
- Black or Brushed Aluminum
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