AR-15/M16 Family FSN/NSN/LSN List
United States FSN/NSN/LSNs
Nomenclature FSN NSN LSN Notes
Variants designated in the US Army Nomenclature System
Carbine, 5.56mm, M4 1005-01-231-0973 5.56x45mm Colt Model 920; may have initially been used to designate the Colt Model 720
Carbine, 5.56mm, M4E1 1005-01-382-0953 M4 variant; 5.56x45mm Colt Model 921; standardized as the M4A1
Carbine, 5.56mm, M4E2 1005-01-383-2835 M4 variant; 5.56x45mm Colt Model 925 with the KAC M4 RAS
Carbine, 5.56mm, M4A1 1005-01-382-0953 M4 variant; 5.56x45mm Colt Model 921
Rifle, 5.56mm, XM16E1 1005-930-0584 1005-00-930-0584 5.56x45mm Colt Model 603; Unclear how this NSN differs from -073-9421, possibly for weapons w/o equipment; standardized as the M16A1
Rifle, 5.56mm, XM16E1, w/ Equipment 1005-073-9421 1005-00-073-9421 5.56x45mm Colt Model 603; NSN for weapons issued with equipment; standardized as the M16A1
Rifle, 5.56mm, M16 1005-856-6885 1005-00-856-6885 5.56x45mm Colt Model 604
Rifle, 5.56mm, M16A1 1005-930-0584 1005-00-930-0584 5.56x45mm Colt Model 603; Unclear how this NSN differs from -073-9421, possibly for weapons w/o equipment
Rifle, 5.56mm, M16A1, w/ Equipment 1005-073-9421 1005-00-073-9421 5.56x45mm Colt Model 603; NSN for weapons issued with equipment
Rifle, 5.56mm, M16A1, w/ Launcher, Grenade, 40mm, XM148 1005-832-8898 1005-00-832-8898 5.56x45mm Colt Model 603; NSN for weapons issued with the XM148 grenade launcher
Rifle, 5.56mm, M16A1, Demil 1005-01-061-2469 5.56x45mm Colt Model 603; demilitarized for use as a training/drill weapon
Rifle, 5.56mm, M16A1, Heavy Barrel 1005-LL-L99-5742 M16A1 variant; uppgrades from earlier M16A1s to 20” A2 profile barrels and handguards
Rifle, 5.56mm, M16A2, w/ Equipment 1005-01-128-9936 5.56x45mm Colt Model 645; NSN for weapons issued with equipment
Rifle, 5.56mm, M16A3, w/ Equipment 1005-01-357-5112 5.56x45mm Colt Model 646; NSN for weapons issued with equipment
Rifle, 5.56mm, M16A4, w/ Equipment 1005-01-383-2872 5.56x45mm Colt Model 945; NSN for weapons issued with equipment
Submachine Gun, 5.56mm, XM177 1005-933-7672 1005-00-933-7672 5.56x45mm Colt Model 610
Submachine Gun, 5.56mm, XM177E1 1005-930-5595 1005-00-930-5595 XM177 variant; variant with forward assist; 5.56mm Colt Model 609
Submachine Gun, 5.56mm, XM177E2 1005-021-2429 1005-00-021-2429 XM177 variant; 11.5" versus 10" barrel; 5.56mm Colt Model 629
Submachine Gun, 5.56mm: Port Firing, M231 1005-01-081-4582 5.56x45mm Colt Firing Port Weapon
Variants designated in the Mark and Mod Nomenclature System
Carbine, 5.56mm, Mk 18 Mod 0 1005-01-527-2288 5.56x45mm Crane NSWC Close Quarters Battle Rifle
Rifle, 5.56mm, Mk 4 Mod 0, w/ Suppressor, Blast, Mk 2 Mod 0 1005-102-8649 1005-00-102-8649 5.56x45mm Colt Model 604 variant; special waterproofed variant for US Navy SEALs and designed specifically to work with the Mk 2 Mod 0 blast suppressor; NSN for weapons issued with the blast suppressor
Rifle, Special Purpose, 5.56mm, Mk 12 Mod 0 1005-01-504-3275 5.56x45mm Crane NSWC Special Purpose Rifle
Rifle, Special Purpose, 5.56mm, Mk 12 Mod 1 1005-01-504-3276 Mk 12 Mod 0 variant; KAC M4 Match free-float RAS instead of PRI free-float Tube
Variants designated in the Aeronautical and Support Equipment Type Designation System
Rifle, 5.56mm, GAU-5/P 1005-01-042-9820 GAU-5/A or GAU-5A/A variant; upgrades from earlier GAU-5s to 14.5” A1 profile barrels
Rifle, 5.56mm, GUU-5/P 1005-01-042-9820 GAU-5/A or GAU-5A/A variant; uppgrades from earlier GAU-5s to 14.5” M4 profile barrels, w/ or w/o flat top upper
Submachine Gun, 5.56mm, GAU-5A/A 1005-973-5685 1005-00-973-5685 GAU-5/A variant; 11.5" versus 10" barrel; Sources differ as to whether this was Colt Model 630 or 649
Variants designated using commercial nomenclature
Carbine, 5.56mm, Model 653 1005-01-029-3866 5.56x45mm Colt Model 653
Carbine, 5.56mm, Model 723 1005-LL-L99-5287 5.56x45mm Colt Model 723
Carbine, 5.56mm, Model 727 1005-01-376-7245 5.56x45mm Colt Model 727
Carbine, 5.56mm, Model 933 1005-01-581-2925 5.56x45mm Colt Model 933
Carbine, 5.56mm, ? 1005-01-469-9387 5.56x45mm Bushmaster XM15E2S V Match Commando
Carbine, 5.56mm, ? 1005-01-524-8481 5.56x45mm Bushmaster M4A3 (Part No. MCWA3F 14M4)
Carbine, 5.56mm, ? 1005-01-544-6969 5.56x45mm Bushmaster ? (Part No. MCWVMF 14M4-CZ)
Carbine, 5.56mm, ? 1005-01-547-6479 5.56x45mm Bushmaster M4A3? (Part No. MCWA3F 14M4X)
Carbine, 5.56mm, ? 1005-01-578-8650 5.56x45mm Bushmaster M4A3 Gas Piston (Part No. MCWA3F 14M4-GP)
Carbine, 5.56mm, ? 1005-01-578-8653 5.56x45mm Bushmaster C15 LE Submachine Gun? (Nomenclature given describes 5.56mm weapon, but Part No. AZ9-C15BMP21S indicates a 9mm weapon)
Carbine, 5.56mm, ? 1005-01-578-8655 5.56x45mm Bushmaster C15 LE Submachine Gun? (Nomenclature given describes 5.56mm weapon, but Part No. AZ9-C15BMP21SP4 indicates a 9mm weapon)
Reciever, Automatic Gun 1005-01-498-1913 1005-LL-L99-5996 5.56x45mm Crane NSWC Close Quarters Battle Reciever; NSN/LSN for upper reciever only
Reciever, Automatic Gun? 1005-LL-L99-1083 5.56x45mm Crane NSWC Special Purpose Reciever; LSN used to cover SPR, SPR/A, and SPR/B; likely LSN for upper reciever only
Rifle, 5.56mm, AR-15 1005-983-6877 1005-00-983-6877 5.56x45mm Colt Model 601?
Rifle, 5.56mm, AR-15 1005-994-9136 1005-00-994-9136 5.56x45mm Colt Model 602?
Rifle, 5.56mm, Model 701 1005-01-382-4722 5.56x45mm Colt Model 701
Rifle, 5.56mm, Model 705 1005-01-382-4607 5.56x45mm Colt Model 705
Rifle, 5.56mm, Model 715 1005-01-303-7493 5.56x45mm Colt Model 715
Foreign (Non-US) NSNs
Variants designated in the Canadian Forces nomenclature system
Carbine, 5.56mm, Automatic, C8 1005-21-898-7045 5.56x45mm Diemaco/Colt Canada C8
Carbine, 5.56mm, Automatic, C8A1 1005-21-921-2563 5.56x45mm Diemaco C8FT/Colt Canada C8A1
Carbine, 5.56mm, Automatic, C8A2 1005-21-913-4965 5.56x45mm Diemaco C8FTHB/Colt Canada C8A2
Rifle, 5.56mm, Automatic, C7 1005-21-898-7044 5.56x45mm Diemaco/Colt Canada C7
Rifle, 5.56mm, Automatic, C7A1 1005-21-909-7599 5.56x45mm Diemaco C7FT/Colt Canada C7A1
Variants designated in the Danish Defense nomenclature system
Gevaer, M/95 1005-21-913-5278 5.56x45mm Diemaco C7FT/Colt Canada C7A1
Let StøtteVåben, M/04 1005-21-913-5019 5.56x45mm Diemaco/Colt Canada LSW
Karabin, M/96 1005-21-913-4977 5.56x45mm Diemaco C8FT/Colt Canada C8A1
Variants designated in the Land Forces (Commonwealth) nomenclature system
Carbine, 5.56mm, L119A1 1005-21-920-6546 5.56x45mm Diemaco/Colt Canada Special Forces Weapon
Variants designated using commercial nomenclature
Carbine, 5.56mm, ? 1005-21-921-1160 5.56x45mm Diemaco/Colt Canada Special Forces Weapon
Carbine, 5.56mm, AR-15? 1005-99-962-3493 5.56x45mm Colt Model 614
Weapon, Light Support, 5.56mm, ? 1005-21-126-9290 5.56x45mm Diemaco/Colt Canada LSW