Editing Guerrilla warfare (section)

===Homemade or improvised firearms===
[[File:Home-made 12-gauge shotgun used by Bosniac fighters.jpg|thumb|right|A crude but effective improvised 12-gauge shotgun used during the [[Bosnian War]]]]
{{main|Improvised firearm}}

The [[Błyskawica submachine gun|Błyskawica]] (Lightning) was a simple [[submachine gun]]  produced by the [[Armia Krajowa]], or Home Army, a Polish [[resistance movement]] fighting the [[Germany|Germans]] in [[History of Poland (1939–45)|occupied Poland]]. It was produced in underground workshops. Its main feature was its simplicity, so that the weapon could be made even in small workshops, by inexperienced engineers. It used threaded pipes for simplicity.

In some cases, guerrillas have used improvised, repurposed firearms. One example is described by [[Che Guevara]] in his book ''[[Guerrilla Warfare (book)|Guerrilla Warfare]]''. Called the "M-16", it consists of a 16 gauge [[sawed-off shotgun]] provided with a bipod to hold the barrel at a 45-degree angle.  This was loaded with a [[blank (cartridge)|blank cartridge]] formed by removing the shot from a standard shot shell, followed by a wooden rod with a [[Molotov cocktail]] attached to the front.  This formed an improvised [[Mortar (weapon)|mortar]] capable of firing the incendiary device accurately out to a range of 100 meters.<ref>{{cite book |title=Guerrilla Warfare |author=Ernesto "Che" Guevara |year=1961 |publisher=Praeger}}</ref>

[[Flare gun]]s have also been converted to firearms.  This may be accomplished by replacing the (often plastic) barrel of the flare gun with a metal pipe strong enough to chamber a [[shotgun shell]], or by inserting a smaller bore barrel into the existing barrel (such as with a [[caliber conversion sleeve]]) to chamber a firearm cartridge, such as a [[.22 Long Rifle]].<ref>{{cite web|url=http://www.usdoj.gov/usao/ct/Newsletters/PSN%20Newsletter%20Winter%202003.pdf |title=Project Safe Neighborhoods |author=US Department of Justice, District of Connecticut |url-status=dead |archive-url=https://web.archive.org/web/20040725095406/http://www.usdoj.gov/usao/ct/Newsletters/PSN%20Newsletter%20Winter%202003.pdf |archive-date=2004-07-25 }}</ref><ref>{{cite web |url=http://pacer.ca4.uscourts.gov/opinion.pdf/964416.P.pdf |title=UNITED STATES OF AMERICA v. BARRY WILLIAM DOWNER |author=UNITED STATES COURT OF APPEALS FOR THE FOURTH CIRCUIT |access-date=2013-04-13 |archive-date=2012-03-06 |archive-url=https://web.archive.org/web/20120306034152/http://pacer.ca4.uscourts.gov/opinion.pdf/964416.P.pdf |url-status=dead }}</ref>

In the [[Myanmar civil war (2021-present)|Myanmar Civil War]], 3D-printed weapons such as the [[FGC-9]] were seen in the hands of anti-[[State Administration Council|military junta]] rebel forces.<ref>{{Cite web |last=Hanrahan |first=Jake |title=Twitter thread with a collection of photos of Myanmar rebels armed with FGC. |url=https://twitter.com/jake_hanrahan/status/1468966318317531140 |url-status=live|archiveurl=https://web.archive.org/web/20220505184550/https://twitter.com/Jake_Hanrahan/status/1468966318317531140|archive-date= May 5, 2022}}</ref><ref>{{Cite web |date=2023-10-21 |title=SSTF လူငယ်တွေဦးဆောင်ပြီး FGC 9 ကာကွယ်ရေး ပြောင်းရှည်သေနတ်ထုတ်လုပ် - YouTube |url=https://www.youtube.com/watch?app=desktop&v=Cw3K-owAITc |access-date=2024-03-24 |website=YouTube |archive-date=2023-10-21 |archive-url=https://web.archive.org/web/20231021130211/https://www.youtube.com/watch?app=desktop&v=Cw3K-owAITc |url-status=live }}</ref><ref>[https://observers.france24.com/en/asia-pacific/20220114-3d-printed-weapons-myanmar-rebels How rebel fighters are using 3D-printed arms to fight the Myanmar junta] January 7, 2022. [[France24]]. Thomas Eydoux.</ref><ref>[https://www.wired.com/story/the-rebel-drone-maker-of-myanmar/ The Rebel Drone Maker of Myanmar] September 29, 2023. Daphne Wesdorp. [[Wired (magazine)|Wired]]</ref>