GENERAL SPECIFICATIONS (20X102MM HEI) This ammunition can be fired by Vulcan guns mounted on helicopter. The rimless bottlenecked case is of steel and electrically primed. GENERAL SPECIFICATIONS (20X128MM TP-T) This ammunition is produced for training purposes and is fired by 20mm anti-aircraft cannons. The shell body is same as HEIT type with front section empty and rear section filled with tracer.
| Type | 20×102 HEI | 20×102 TP-T | 20×128 TP-T |
| Round length (mm) | 168 | 168 | 203.5 |
| Case length (gr) | 102 | 102 | 92.3 |
| Round weight (gr) | 257 | 260 | 340 |
| Bullet weight (gr) | 101 | 95 | 126 |
| Type of powder | Double base Core | Double base Core | Double base Core |
| Type of primer | Electric | Electric | Percussion |
| Mean of muzzle velocity (m/s) | 1030 | 1030 | 980 |
| Maximum gas pressure (kgf/cm2) | Pmed. Max. ≤ 3300 | Pmed. Max. ≤ 3300 | Pmed. Max. ≤ 3600 |
| Minimum tracer range (m) | 1400 | 1400 | - |
| Armament | M39 - M61 | M39 - M61 | KAA, KAB |
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