I was thinking about getting a x50 blue or red which ever best buy has in stock. If i was to get a x50 would it have the m4 platform or the s7? I know they frist had the s7 when the x50 frist came out many years ago. But didnt they change that since with the m4 ? Also would the x50 have about the same range as my ix ? and the same off axis? And if anyone that owns a x50 could let me know about thier pros and cons.