I have a Colt AR-15A2 Sporter II serial number SP 340XXX. It has the large pin receiver (front pin has a screw), a slabside lower, foreward assist, and A1 sights. Barrel is marked C MP 5.56 NATO 1/7.
I got this gun in a trade for a Smith 640 plus $100 (I started to distrust the ILM after doing some research). The rifle has had better days, and I was told that apparently this was an LEO gun at one time (has some kind of name or agency marking on the stock).
I out 250 rounds or thereabouts on the day I picked it up, and ever since then, it has resided in my safe. I was thinking about selling it in order to fund another AR project. Before doing that I was hoping for some info on this model. Apparently the Sporter II models only came with A2 sights, which makes this rifle a bit of an anomaly.
If somone could give me a roundabout number as to more or less what it could be worth, and mabe some background information I'd appreciate it.