Waco is a 2018 limited event series that focuses on the events surrounding the infamous 1993 raid and subsequent standoff between the ATF and the Branch Davidian sect led by David Koresh (portrayed here by Taylor Kitsch) at their compound outside of Waco, Texas. The limited series, which premiered in the US in January of 2018, was one of the very first to debut on the newly formed Paramount Network (formerly Spike TV/TNN).
The following weapons were used in the miniseries Waco (TV Series):
ATF Special Agent Edward Wiggins (Christopher Stanley) is seen with a SIG-Sauer P226 during the initial siege at Mount Carmel. Other ATF agents seemed to be armed with this pistol as well.
Beretta 92FS
Jacob Vazquez (John Leguizamo) has a Beretta 92FS while in surveillance of Mount Carmel. The Beretta is also used by many of the ATF agents in the series. When David Koresh (Taylor Kitsch) examines Vazquez' gun, it's possible to see that it has the hex screws of the current production 92FS models (those produced after 2003). This means that the particular gun used in the scene is anachronistic for the time period in which the events depicted in the series took place (1993).
Beretta M9A1
Steve Schneider (Paul Sparks) uses what appears to be a Beretta M9A1 during a final meeting with David Koresh (Taylor Kitsch) in the series finale "Day 51" (S1E06). This is anachronistic, as the M9A1 was released in 2006 and the events of the series take place in 1993.
Many ATF agents are armed with Heckler & Koch MP5A2s during the beginning of episode 1. FBI HRT agents are also armed with the MP5A2 in addition to Branch Davidians Steve Schneider (Paul Sparks) and Wayne Martin (Demore Barnes).
M16A2s are seen in the hands of some ATF agents during the beginning of the siege. FBI HRT agents also use this rifle.
Ruger Mini-14
A Ruger Mini-14 is seen in the hands of Randy Weaver and Kevin Harris during the incident at Ruby Ridge.
Remington 700PSS
FBI HRT sniper Lon Horiuchi (Rich Ting) uses a Remington 700PSS rifle in an attempt to kill Randy Weaver at Ruby Ridge. An ATF agent is also seen with a Remington 700 during the beginning of the Mount Carmel siege. The scope attached on a picatinny rail would make this rifle partly anachronistic.
Colt Model 653
A Colt Model 653 is seen at the beginning of the siege used by one of the Davidians.
AK Variants
Branch Davidian members are also armed with AK type rifles.
M4A1
In "Visions and Omens" (S1E01), a recruitment poster depicts what is presumably an ATF agent armed with what appears to be an anachronistic customized M4A1 that is fitted an assortment of accessories that also did not exist in the time period.
Other
Mount Carmel Armory
While at Mount Carmel, Koresh is seen with a variety of weapons in his armory. There's an assorted different types of guns, including lever-actions, M16A2s, SKSs, Mosin Nagants, etc