Purchasing a M&P-15 and a Eotech 512 with 3x or 4x. Deciding on the 15A flip up rear and front tower sight or go with the 15OR optic ready. Using as a fun varmint gun and some what at the range. What would it be like with the front tower sight, should I use a riser to make the 512 higher? Also, looking for suggestion on 3x or 4x big price difference don't have unlimited funds (i.e. married) looking for suggestions on what type of package to put together. Also, should I be looking at a 1-4x Illuminated scope any brands in the $600-800 range?
Thanks