The 37 mm OR-167N (M1939) projectile is a Soviet 37x252 mmSR fragmentation-with-tracer projectile associated with the UOR-167N fixed round for 61-K-family and related 37 mm guns. Ordnance guides list OR-167N beside the earlier OR-167 and tie it to point-detonating self-destruct fuzes, while specialist references preserve the OP-167H alternate rendering used in UXO identification material.
OR-167N sits in the same 37 mm M1939 ammunition set as the earlier OR-167 fragmentation-tracer projectile and BR-series armor-piercing tracer projectiles.
| Variant | Configuration | Designation notes |
|---|---|---|
 | Earlier fragmentation-tracer projectile | JMU and METIS references treat OR-167N / UOR-167N as the later N-designation counterpart to the OR-167 / UOR-167 37 mm fragmentation-tracer ammunition. Sources: Projectile Identification Guide, Munition, cannon, 53-OR-167N | METIS, Munition, cannon, 53-UOR-167N | METIS |
 | Armor-piercing tracer projectile in the same 37 mm M1939 family | JMU ordnance-guide entries list BR-167 AP-T and OR-167N FRAG-T material in the same 37 mm M1939 ammunition-guide sequence. Sources: Projectile Identification Guide, Afghanistan Ordnance Identification Guide, Volume 1 |
CAT-UXO, JMU ordnance-guide material, and ammunition references place OR-167N in the Soviet 37 mm M1939 ammunition set used with the 61-K family and related guns.
| Firing weapon | Weapon type | Firing evidence |
|---|---|---|
 | Towed 37 mm automatic anti-aircraft gun | The 61-K family is documented as firing 37x252SR shells, while the JMU guide and BulletPicker identify OR-167N as a 37 mm FRAG-T projectile tied to the UOR-167N cartridge. Sources: 37 mm Automatic Air Defense Gun M1939 (61-K), Projectile Identification Guide, Projectile, 37mm Frag-T, OR-167N - BulletPicker, Cartridge, 37mm Frag-T, UOR-167N - BulletPicker |
OR-167N belongs to a small 37 mm M1939 ammunition cluster that includes fragmentation-tracer and armor-piercing tracer projectile types.
| Compatible item | Item type | Compatibility evidence |
|---|---|---|
| Earlier 37 mm fragmentation-tracer projectile | JMU and BulletPicker references list OR-167 and OR-167N as adjacent Soviet 37 mm FRAG-T projectiles, with UOR-167 and UOR-167N naming the corresponding fixed cartridges. Sources: Projectile Identification Guide, Projectile, 37mm Frag-T, OR-167N - BulletPicker, Cartridge, 37mm Frag-T, UOR-167N - BulletPicker, Munition, cannon, 53-UOR-167N | METIS |
Reference sources use several layers of nomenclature for the same ammunition family. OR-167N names the projectile, UOR-167N names the fixed cartridge, and 53-prefix forms appear in GAU-style round and projectile indexes.
OR-167N / 53-OR-167N, a 37 mm fragmentation-tracer projectile listed with 35 g N.E.W. in the JMU ordnance guide.
Sources: Projectile Identification Guide; Projectile, 37mm Frag-T, OR-167N - BulletPicker.
UOR-167N / 53-UOR-167N, the cartridge designation tied to the OR-167N projectile in BulletPicker and METIS references.
Sources: Cartridge, 37mm Frag-T, UOR-167N - BulletPicker; Munition, cannon, 53-UOR-167N | METIS.
The JMU guide lists B-37, MG-8, MG-10, and MG-37 point-detonating self-destruct fuze compatibility for the OR-167N projectile.
Source: Projectile Identification Guide.
Ukraine ammunition-identification guides list 37 mm OR-167 and OR-167N projectiles, but those guide entries do not by themselves identify a user, firing event, transfer, or side-specific conflict use.
Sources: Basic Identification of Ammunition in Ukraine v7.0 [7, English Edition]; Basic Identification of Ammunition in Ukraine v9.
