Does it look like a No. 4 Lee-Enfield? If so, it's a No. 7 rifle. They're single shot only. The mag doesn't feed the rifle. It just provides a feed ramp when loading and a place for the spent cartridges to go upon extraction. Post a picture if you can.
I am not sure what a Lee Enfield #4 looks like but it doesnt sound like this gun. The marks on the barrel says Canadian MK7 ( the seven is in roman numeral). I am sure that it does take a magazine as there is a place for it to go.I will post a picture of it shortly. Thank you for the reply.