I recently acquired a LEO M15A4, but I am having reliability issues with it. This forum has been a huge help with diagnostic information, so I won't get into the issues. However, I received some interesting information on this rifle- Armalite's records show it to be a stripped receiver, which leads me to believe its been built up with questionable parts. It has an aluminum telescopic stock and no M4 ramps (the Armalite rep told me that the lack of M4 ramps were a possible cause of the malfunctions). Additionally, the front sight (a Picatinny gas block/ removable front sight) had to be raised unusually high. I'm using a GG&G BUIS rear sight and it is moved to the right an awful lot. This rear sight is the only thing I've added to the rifle.
So, I'm wondering if any of you know if: Armalite uses aluminum stocks, is the upper supposed to come with M4 ramps (LEO or not) and is it normal for my sights to be that far off from mechanical zero.
Thanks!