The suffix of M71 was assigned to the Browning model BAR(Browning semi-auto rifle) which was made in the year 1971 in Belgium for Browning.
300 or so
50-500 usd
50-5000 usd depending on specifics.
No serial number provided
1971. is it a sweet 16?
Impossible to answer without a detailed description.
100-1500 usd
1200.00
getting one tomorrow for about $500
50-500 USD or so
Your browning auto-5 shotgun was made by FN of belguim for browning in 1957.