Bootleg Gunz:The Bazaar of Bizarre Guns - "A .45 homemade submachine gun made by Ulster loyalist paramilitaries held in a Greater Manchester police armoury. It appears to use an M3 Grease Gun
M3A1 Kit version
Grease Gun Storage : 7 Steps - Instructables
Scourge of meth-linked homemade guns in Winnipeg hits record high in 2019, police say | CBC News
The DIY guns of Royal Nonesuch (PHOTOS) :: Guns.com
homemade M3 Grease gun - YouTube
The Ugly Duckling: How the M3 "Grease Gun" Gained a Foothold in Combat - ITS Tactical
Which gun has fewer parts and is simpler to build, the STEN, the M3 Grease Gun or the AK-47? - Quora
M3 Grease Gun: full disassembly & assembly - YouTube