As differentiated by no special cleaning required
NSN 5895-01-393-7963
NSN 5925-00-394-6894
NSN 5996-01-067-8303
NSN 6145-00-033-2997
NSN 5998-01-141-0404
NSN 5910-01-243-0162
NSN 6620-01-564-6719
NSN 5990-01-525-2250
NSN 5965-01-015-0744
NSN 5835-01-241-1090
NSN 5920-01-194-2940
NSN 6130-01-100-3280