Specna Arms SA-J20 FLEX High Speed (30 rps): specs, joules & FPS
Complete specs Specna Arms AEG (electric)
Specna Arms SA-J20 FLEX High Speed (30 rps), AEG: 1.01 J, 330 FPS, 2,055 g, 80 rounds. Full specs from the official source, with FPS for every BB weight.
Power
Above Italy's 1 J limit
Italian shops sell versions tuned below 1 J: ask the shop which version they ship.
Energy computed from the velocity with 0.20 g BBs, the standard weight manufacturers and shops use to measure FPS.
For information only, based on the source's data for this version. Not legal advice: always check current local law and the version the shop sells.
Technical specifications
| Brand | Specna Arms |
|---|---|
| Model | SA-J20 FLEX High Speed (30 rps) |
| Manufacturer code | SPE-01-039598 |
| Category | SMGs |
| Power source | AEG (electric) |
| Platform | AK |
| Weight | 2,055 g |
| Length | 410 mm |
| Inner barrel | 210 mm |
| Magazine | 80 rounds |
| Gearbox | V3 modificato |
| Battery | 7,4 V LiPo · connector Deans (T-plug) |
lunghezza totale indicata come 69.30 senza unità
Weighs 2,055 g: lighter than 78% of AEG replicas in the same category in the database (171 with weight).
Similar alternatives
Replicas of the same type and category that stay within the Italian 1 J limit.
| Replica | Energy | FPS | Weight |
|---|---|---|---|
| Novritsch SSR9 DSG AEG | 1 J | 328 | 1,900 g |
| Novritsch SSR90 Gen2 Electric SMG | 1 J | 328 | 1,900 g |
| G&G ARP9 | 1 J | 328 | 2,000 g |
| Cybergun FN P90 AEG SMG - Black (CM060) - by CYMA | 0.95 J | 320 | 2,050 g |
| Cybergun FN P90 AEG SMG - TAN (CM060) - by CYMA | 0.95 J | 320 | 2,050 g |
Velocity with different BB weights
At the same energy, heavier BBs leave the barrel slower. Expected velocity with the most common weights:
| BB weight | FPS | m/s |
|---|---|---|
| 0.20 g | 330 | 101 |
| 0.25 g | 295 | 90 |
| 0.28 g | 279 | 85 |
| 0.30 g | 269 | 82 |
| 0.32 g | 261 | 80 |
| 0.36 g | 246 | 75 |
| 0.40 g | 233 | 71 |
Theoretical calculation at constant energy (1.01 J). Real-world values can differ slightly with hop-up and replica.
Data source
The values on this page come from the product page of the shop gunfire.com, checked on 2026-11-07. The manufacturer does not publish full specs: values may refer to the version that shop sells.
Shop product page ↗ gunfire.com
Spotted a wrong or missing value? Let us know.