integralaction,
I have two byf 41's in the "u" block that both have black plastic grips and two matching fxo aluminium based numbered magazines, so at least some of the aluminium based magazines were being numbered at this time. After the "u" block seldom do you find a numbered magazine, although I do have a no suffix byf that again has two matching numbered aluminium based magazines. After the "u" block either blank aluminium or blank black plastic bases are normally found. -- Bill
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