Question: Hacksaw Ridge is a documentary about Desmond Doss who was unable to carry a weapon due to his what?

Context articles: Zastava P25
AA-52 machine gun
Handgun holster
Thomas W. Bennett (conscientious objector)
Desmond Doss
List of accolades received by Hacksaw Ridge
Hacksaw Ridge
Hugo Weaving
Sawed-off shotgun
The Conscientious Objector

The Zastava P25, nicknamed the Dark Lady, is a blowback-operated, single-action, semi-automatic pocket pistol chambered in .25 ACP.
 The P25 is manufactured by Zastava Arms of Serbia.
 It features a two-stage safety mechanism whereas pulling the hammer into the first position blocks both the trigger and the hammer.
 The pistol frame is made of aluminum alloy and the barrel is made of alloy steel, while the handgrips are usually made of walnut or polymer materials.
 The P25 is aimed extensively at the civilian market as a self-defense weapon due to its concealability, but is somewhat less favorable compared to the M57, M88 and CZ 99 pistols due to its small caliber.
The AA-52 (full designation in French: "Arme Automatique Transformable Modèle 1952", "Transformable automatic weapon model 1952"), also known as "La Nana", is one of the first French-produced guns of the post–World War II era.
 It was manufactured by the French government-owned Manufacture d'armes de Saint-Étienne (MAS) company.
 The AA-52 is still used today as a vehicle-mounted weapon due to large quantities in service, but has been replaced in the helicopter role by the Belgian FN MAG, starting with the EC 725 Caracal of the special operations units and the Air Force search and rescue teams.
 The AA-52 had been largely phased out for infantry use in favour of the lighter FN Minimi.
 The AA-52 is still in use in Afghanistan.
Holsters are generally designed to offer protection to the handgun, secure its retention, and provide ready access to it.
 The need for ready access is often at odds with the need for security and protection, so the user must consider the individual's needs.
 Choosing the right balance can be very important, especially in the case of a defensive weapon holster, where failure to access the weapon quickly or damage or loss of the weapon due to insufficient retention or protection could result in serious injury or death to the user.
Thomas William Bennett (April 7, 1947 – February 11, 1969) was a U.S. Army medic and the second conscientious objector to receive the Medal of Honor (Desmond Doss, a medic in World War II, was the first).
 Bennett was killed in action during the Vietnam War and posthumously received the Medal of Honor.
Desmond Thomas Doss (February 7, 1919 – March 23, 2006) was a United States Army corporal who served as a combat medic with an infantry company in World War II.
 He distinguished himself in the Battle of Okinawa by saving 75 men, becoming the first conscientious objector to receive the Medal of Honor for actions above and beyond the call of duty.
 He is also the only conscientious objector to receive the medal during World War II and the only conscientious objector to receive the award who was not killed in action.
 For separate earlier acts of valor Doss was twice awarded the Bronze Star.
 Desmond Doss has been the subject of books, a documentary and the 2016 Hollywood blockbuster "Hacksaw Ridge".
"Hacksaw Ridge" is a 2016 biographical war film, directed by Mel Gibson and written by Andrew Knight and Robert Schenkkan.
 Starring Andrew Garfield, the film focuses on the World War II experiences of Desmond Doss, an American pacificist combat medic who was a Seventh-day Adventist Christian, refusing to carry or use a firearm or weapons of any kind.
 He became the first conscientious objector to be awarded the Medal of Honor, for service above and beyond the call of duty.
 It was released in the United States on November 4, 2016.
 The film was released to positive reviews, with a Rotten Tomatoes approval rating of 87%, based on 223 reviews, and an average rating of 7.2/10.
 Metacritic lists a score of 71 out of 100, based on 47 reviews.
Hacksaw Ridge is a 2016 biographical war drama film directed by Mel Gibson and written by Andrew Knight and Robert Schenkkan, based on the 2004 documentary "The Conscientious Objector".
 The film focuses on the World War II experiences of Desmond Doss, an American pacifist combat medic who was a Seventh-day Adventist Christian, refusing to carry or use a firearm or weapons of any kind.
 Doss became the first conscientious objector to be awarded the Medal of Honor, for service above and beyond the call of duty during the Battle of Okinawa.
 Andrew Garfield stars as Doss, with Sam Worthington, Luke Bracey, Teresa Palmer, Hugo Weaving, Rachel Griffiths, and Vince Vaughn in supporting roles.
Hugo Wallace Weaving (born 4 April 1960) is an English-Australian film and stage actor.
 He is best known for playing Agent Smith in "The Matrix" trilogy (1999–2003), Elrond in "The Lord of the Rings" (2001–2003) and "The Hobbit" (2012–2014) film trilogies, V in "V for Vendetta" (2006), Red Skull in "" (2011) and Tom Doss in "Hacksaw Ridge" (2016).
A sawed-off shotgun (US, CAN) also called a sawn-off shotgun (UK, IRL, AU, NZ) and a short-barreled shotgun (SBS) (U.S. legislative terminology), is a type of shotgun with a shorter gun barrel—typically under 18 inches—and often a shortened or absent stock.
 Despite the colloquial term, barrels do not, strictly speaking, have to be shortened with a saw.
 Barrels can be manufactured at shorter lengths as an alternative to traditional, longer barrels.
 This makes them easier to transport due to their smaller profile and lighter weight.
 The design also makes the weapon easy to maneuver in cramped spaces, a feature sought by military close quarters combat units, law enforcement SWAT team users, and home defense purposes.
 With modern pump action/magazine tube shotguns, the shorter barrel limits the magazine capacity of the weapon due to the magazine tube protruding beyond the barrel.
 Therefore, the magazine tubes are matched in length to the barrel, which causes a reduction in the number of shells that can be held in the magazine tube.
The Conscientious Objector is a 2004 documentary film about the life of Desmond Doss, a conscientious objector who received a Medal of Honor for service in World War Two.
 His religious faith, Seventh-day Adventism, did not permit him to carry a weapon.
 For his stance he at first faced opposition and sometimes persecution from commanding officers and ridicule from fellow soldiers, but ultimately won their admiration while demonstrating enormous courage and saving many lives as a combat medic.