Am considering the Kel-Tec SU-16D12 or SU-16D9, the short-barrelled, lightweight 5.56x45mm rifle.
1. Does anyone have specific experience with either of these, the 12" or 9" variant? Pros/cons, from having used it?
2. General comments on the suitability of a 2500fps 5.56 round, in terms of fragmentation and performance?