Age hasn't appeared to slow down John Rambo, neither on the big screen or at the box office according to early estimates.

Industry analysts predict Rambo: Last Blood, the upcoming fifth installment in the iconic action franchise, is tracking to earn approximately $21-24 million across its opening weekend at the domestic box office. Even at the low end of the estimate, this would give the venerable film series its best opening weekend.

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The previous record holder, without adjusting for inflation, is 1985's Rambo: First Blood Part II which opened to $20.1 million domestically. After adjusting for inflation, the 1985 sequel's opening weekend total comes in to approximately $47.9 million. The previous film in the franchise, 2008's Rambo, had a domestic opening weekend of $18.2 million before earning $113 million at the worldwide box office across its entire theatrical run.

Last Blood features Sylvester Stallone's eponymous Vietnam War veteran trying to enjoy a quiet life of peace at his family ranch in Arizona. After a friend's daughter is kidnapped by Mexican cartels, however, the former special forces soldier takes the fight across the border with bloody results.

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Directed by Adrian Grunberg (Get the Gringo) from a script written by Sylvester Stallone and Matt Cirulnick (Absentia), Rambo: Last Blood stars Stallone, Paz Vega, Sergio Peris-Mencheta and Yvette Monreal. The film hits theaters Sept. 20.

(via Movie Web)