received my mr556 upper today
was thinking to order a 11 inch upper, until i saw a big box delivered to my home today. i realized i bought a 16.5inch upper. But it looks fantastic with original gun bag, etc. just realized the normal geissele sse doesn't work for it, have to order something else. but excited to get my first piston AR.
was thinking to order a 11 inch upper, until i saw a big box delivered to my home today. i realized i bought a 16.5inch upper. But it looks fantastic with original gun bag, etc. just realized the normal geissele sse doesn't work for it, have to order something else. but excited to get my first piston AR.
