Older D&E magazine for the Remington 742, 7400, etc. rifles. It is for a short action. 30-06 doesn't fit, 308 does so will 243. I got this on a package deal (they thought it went with the FAL..........) I put 9 rounds in it. It doesn't seem to hold 10 and shows a window with the number "8". I keep moving this thing around so somebody take it. It has been used. Saw one on GB for $30 so it must be worth $20 shipped. That's $20 shipped. If you have enough posts I will send it and let you check it first.