Hello all, my first post here so please bear with me!

I have almost got my L4A3 back together and am having really only one final issue.

I do have a 7.62 marked locking shoulder installed, but the 7.62 bolt doesn't fit. A 303 bolt does fit with the 7.62 shoulder. The receiver is a hybrid of Mk I and L4A3 sections. Specifically the barrel socket area (which is the area with the bolt stops) in the receiver is Mk I.

I do not yet have a 308 barrel (waiting for Sarco or other source) so not too fired up to modify receiver before having that unless modifications are well understood.

Can anyone offer any guidance? Did the L4A3 refurbishment/conversion (from a Mk II) modify the forward bolt stops in the receiver? Kind of stumped and don't want to modify something I'll regret later.

Would be very grateful for any help in getting this old girl back up and running!
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