Yes, the LP-S used the action of the LGB1 Biathlon rifle and the same magazines. The trigger is from the LP50. Correct, the mags for the LP50 don't fit the .177 Hunting 5 rifles, those mags insert from the opposite side of the action and are quite a bit bigger, probably a much more robust action for the additional power and to accommodate the .22 cal . Both mags in pic are .177.
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