The MkIV was approved for Land Service in 1921 and is
a conversion from the SMLE Mk III & III*.
The magazine was added in May 1925 with the spring &
The bolt has an off centre floating firing pin & larger extractor claw.
This example is a commercial conversion to the .22 MkIV* Pattern by AG Parker
This particular rifle has matching serial numbers. The rear sight fitted is windage adjustable and is calibated for .22 by the addition of the 25 yard sighting mark.
Comes complete with the BSA Parker No.9 aperture target rear-sight.