Based on the clue 'a standard attachment to the underside of the m16 ...', what is the answer?

Based on the clue 'a stamp commemorating this poet includes a scene f...', what is the answer? Based on the clue 'a stamp honoring this man includes a photo of cent...', what is the answer? Based on the clue 'a stamp honors this 19th c author about whom it wa...', what is the answer? What is associated with: a stamp issued in 2002 for the 100th anniversary of his birth included the full texts of 6 of… What is referred to by 'a standard gmt'? What is referred to by 'a standard or pennant'? Based on the clue 'a standard piano has 52 white keys this many blac...', what is the answer? Based on the clue 'a standard round of pga golf is this many holes', what is the answer?