Assertion: lr's use | /r/Causes | lead-fouling of the gas-port
Facets:
Source sentences:
text: Owners of guns that use gas systems, such as AR-15 sport style rifles, normally avoid firing non-jacketed .22 LR cartridge ammunition, as the use of unjacketed ammunition may cause lead-fouling of the gas-port inside the barrel and costly gunsmithing procedures.