The sideplate and takeddown are marked in a commercial location, not sure why. More photos, left side, would help. I'm sure there is a logical explanation, just not thinking of one at this late hour.
Clean all the internals well before going to the range, and only load one at a time until you are sure it is safe to fire. Then 2, etc. The striker not catching may indicate that some 'smithing is in order.
dju
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