steve99, thanks for the reply. My Mo. 57 has the front sight you describe also a rear flip up barrel sight. It is missing the aperture and attaching sliding bar to the Lyman 42w reciever sight, although i am ordering 3 apertures from Apertures n More (.095/.050/.040 ) , still need to find the sliding bar they attach to. The fabric sling is a little worn at the forward sling swivel, but serviseable, buckles/keepers say "NOBUCL", and appear to be brass. Underside of the barrel is stamped "27" ( date of man. ) and 217 ( bore dia.), normal .22lr bore is usually .219, so .217 is a bit tighter, should group accordingly. Magazine is stamped Winchester .22lr, and the barrel is stamped .22 lr, so no shooting shorts/longs. Breech is coned, and in great shape. .......Best regards, buntingmiester