I got a used Mod 10 .223 5 to 10 years ago and didn't think much of the many varieties of Mod 10s at the time. It had a bull barrel and a cheap plastic factory stock. I'm a sucker for bull barrels and I like the accu trigger better than any of the other manufacturers' stock triggers. I shot it, liked it, restocked it with a Boyd's target stock, and bedded it. That's all I did to make it a great shooter. It needs a new barrel, but it still shoots better than most off the shelf .223s. I want to get a new one to keep it company in it's old age, but I don't know what it is. There are so many different Mod 10 variants out there and I cannot match it to any of them. Mine has a short (2 1/2") ejection port and a short magazine. All the new models that I have seen have a long/short (3") ejection port and a blocked out magazine to shorten it for .223 rounds. My mod 10 precision carbine is like that. They all just have Mod 10 stamped on them. Can some one please help me find out what I have and what is now a match for It?