.410 Lee-Enfield This is a Lee-Enfield Number 1 Mark 3 bolt action single shot .410. It chambers 2 7/8” or 3” .410 shotgun shells. It is marked .410 R.F.I. 1948. RFI is Rifle Factory Ishapur, India. The Magazine well is filled with a wooden block and its fitted with a special Trigger Guard and Magazine Plate. According to US law if it is marked .410 on the receiver like it is, then it is a shotgun. It has a very clean and shiney bore.