New Specna Arms CORE BBs are available in Poland since May. We tested those BBs in a controlled environment:
- indoor sport shooting range,
- temperature of 23℃, humidity - 41%,
- distance to target - 25 m,
- carbine set on a shooting rest by K-Zone.
The most important factor of the test was grouping, which helped us asses the quality of the BBs. At the end we conducted shooting using BBs considered as "the best" in our airsoft community, weighing 0.2 g and 0.25 g. For each BB weight we used an appropriate spring. Muzzle velocity test were done using XCORTECH X3500 chronograph.
Platforma testowa:
The test platform was the UAR carbine by APS which underwent a thorough upgrade.
Configuration:
- SHS 18:1 gears on ball bearings,
- SHS piston with 14 steel teeth,
- Ultimate silent piston head with a bearing,
- Ultimate cylinder head,
- APS stock nozzle with an o-ring,
- APS stock spring guide with a ball bearing,
- Element Ultra Torque motor,
- low-resistance 16 AWG wires,
- Gate Pico SSR3 mosfet,
- APS stock 363 mm barrel,
- G&G green elastic bucking.
Battery: 11.1 V 1800 mAh 45C Brainergy.
Hop-Up set at zero.
Muzzle velocity measurement
Core Specna Arms BBs:
| 0.2 g | 0.23 g | 0.25 g | 0.28 g | 0.3 g | ||||||
| M100 | M100 | M110 | M120 | M130 | ||||||
| regular | bio | regular | bio | regular | bio | regular | bio | regular | bio | |
| 1 | 406.0 | 404.7 | 379.4 | 382.9 | 382.1 | 385.1 | 388.1 | 387.7 | 383.1 | 382.7 |
| 2 | 407.2 | 398.1 | 382.2 | 384.0 | 382.1 | 380.2 | 388.6 | 387.5 | 384.4 | 384.1 |
| 3 | 408.7 | 400.5 | 379.4 | 382.3 | 387.3 | 381.6 | 387.6 | 385.0 | 382.8 | 385.0 |
| 4 | 408.3 | 399.3 | 379.5 | 383.6 | 385.6 | 381.7 | 387.8 | 384.0 | 383.8 | 384.9 |
| 5 | 408.5 | 401.3 | 384.6 | 384.7 | 383.7 | 384.0 | 389.0 | 384.4 | 382.2 | 383.7 |
| average | 407.7 | 400.8 | 380.6 | 383.7 | 384.1 | 382.6 | 388.4 | 385.7 | 383.3 | 384.1 |
| difference | 7.0 | -3.1 | 1.6 | 2.7 | -0.8 | |||||
Reference G&G BBs:
| G&G 0.2 g | G&G 0.25 gg | |
| M100 | M120 | |
| 1 | 412.4 | 387.7 |
| 2 | 410.7 | 385.9 |
| 3 | 408.9 | 384.7 |
| 4 | 411.7 | 385.8 |
| 5 | 410.5 | 383.6 |
| average | 410.8 | 385.5 |
Comparison of Core Specna Arms and G&G BBs of comparable weight:
| Specna ARMS 0.2 g | G&G 0.2 g | Specna ARMS 0.25 g | G&G 0.25 g | |||
| M100 | M110 | |||||
| regular | bio | regular | regular | bio | regular | |
| 1 | 406.0 | 404.7 | 412.4 | 382.9 | 382.1 | 387.7 |
| 2 | 407.2 | 398.1 | 410.7 | 384.0 | 382.1 | 385.9 |
| 3 | 408.7 | 400.5 | 408.9 | 382.3 | 387.3 | 384.7 |
| 4 | 408.3 | 399.3 | 411.7 | 383.6 | 385.6 | 385.8 |
| 5 | 408.5 | 401.3 | 410.5 | 384.7 | 383.7 | 383.6 |
| average | 407.7 | 400.8 | 410.8 | 383.7 | 384.1 | 385.5 |
| difference | -3.1 | -10.1 | - | -1.4 | -3.0 | - |
Observations:
Except for the 0.2 g weight BBs, the difference between Core Specna Arms regular and BIO BBs are marginal, and can be safely disregarded. A similar conclusion comes from comparing Core BBs with ones made by G&G - the are differences - G&G BBs are slightly faster, but again the differences are small.
Target shooting test
The aiming point was always the same, marked on the photo with the symbol of a scope reticle.
Core 0,2 g BBs
(rozrzut - ang. grouping)
Core 0,23 g BBs
(rozrzut - ang. grouping)
Core 0,25 g BBs
(rozrzut - ang. grouping)
Core 0,28 g BBs
(rozrzut - ang. grouping)
Core 0,3 g BBs
(rozrzut - ang. grouping)
Comparison with 0,2 g G&G BBs:
and 0,25 g G&G BBs:
Whereas in the case of muzzle velocity the differences between Core and G&G BBs were very small, the difference in grouping is very noticeable. What is the cause? The only possible cause might be the quality (uniformity) of the plastic the BBs are made from. The plastic in G&G product must be more uniform, lacking microbubbles of air, which results in very similar, predictable trajectory of each BB. The geometric centre must be closer to the center of mass of the BB. In the budged product of Specna Arms the grouping is wider but still acceptable for support weapons and many assault rifles. Despite all of the above there is always the question of "quid pro quo" - in this test we compared popular budged level BBs with one of the best BBs available on the market. Bearing that in mind I think that the Core Specna Arms BBs fared surprisingly well.
The BBs were tested thanks to to courtesy of Specna Arms
