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The Green Gas VAPOR™ BLUE 117 PSI (Extremely Summer) by Specna Arms is the ultimate propellant for gas-powered replicas with polymer slides, such as the renowned Tokyo Marui or KSC. Supplied in a convenient 600 ml canister, this gas stands out as the perfect and modern equivalent of classic 134a / H134a gas. Its eco-friendly and completely silicone-free formula ensures lethal shooting precision without fouling the hop-up. With a safe and moderate pressure of 117 PSI, it is the essential choice for protecting delicate mechanisms and plastic slides during scorching summer days (from 15°C upwards).
This is an approximate conversion table to help you find your size. If you have already purchased an item from our brand, we recommend you select the same size indicated on its label.
| International | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Europe | 32 | 34 | 36 | 38 | 40 | 42 | 44 |
| US | 0 | 2 | 4 | 6 | 8 | 10 | 12 |
| Chest Circumference (inches) | 33-35" | 36-38" | 39-41" | 42-44" | 45-47" | 48-50" | 51-53" |
| Chest Circumference (cm) | 84-89 | 91-97 | 98-104 | 107-112 | 114-119 | 122-127 | 129-134 |
| Waist Circumference (inches) | 28" | 30" | 32" | 34" | 36" | 38" | 40" |
| Waist circumference (cm) | 71 | 76 | 81 | 86 | 91.5 | 96.5 | 101.5 |
LOWA FOOTWEAR SIZE CHART
SIZE SELECTION:
THE SIZES IN THE DROP-DOWN MENU ARE UK SIZES (ENGLISH)
conversion chart: UK size - (IT size) - size in mm
Size 6.5 (40) 257mm
Size 7 (40 3/4) 262mm
Size 7.5 (41.5) 266mm
Size 8 (42) 270mm
Size 8.5 (42.5) 274mm
Size 9 (43 1/4) 278mm
Size 9.5 (44) 283mm
Size 10 (44.5) 287mm
Size 10.5 (45) 291mm
Size 11 (46) 295mm
Size 11.5 (46.5) 300mm
Size 12 (47) 304mm
Size 12.5 (48) 308mm
Size 13 (48.5) 312mm
NEED ADVICE ON CHOOSING A SIZE?
Take one of your sneakers and look at the size in mm or cm, look at the diagram above to see what it corresponds to and order your size!
e.g., your sneaker is 27.2 cm long? Great, the closest and most correct size will be: "TG 8.5 (42.5) 274mm", in the purchase menu select size 8.5UK!
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The Ultimate Protection for Polymer Slides:
If you're looking for a reliable gas that works in perfect synergy with your replica without destroying it, the VAPOR™ line by Specna Arms is the solution. The Blue variant, delivering a stable pressure of 117 PSI (measured at 25°C), is specifically designed for GBB and GNB replicas with ABS or lightweight polymer slides. Being the perfect equivalent of 134a / H134a gas, it offers stable performance, realistic recoil, and, most importantly, a safe pressure level that doesn't excessively stress the delicate internal components of Japanese brands during the warmer months.
"Silicone-Free" Precision and Reliability:
As with the rest of the VAPOR™ line, the Blue gas also boasts a totally silicone oil-free composition. This "dry" characteristic is fundamental: it prevents the accumulation of residues and lubricant inside the delicate hop-up chamber and on the bucking itself. The result is a consistently stable Magnus effect, which translates into much tighter groupings and predictable shots. Furthermore, its eco-friendly formula ensures consistent delivery and perfect valve sealing.
| Variant | Pressure (at 25°C) | Recommended Use | Optimal Temperature |
|---|---|---|---|
| VAPOR™ Blue | 117 PSI | Pistols with polymer slides (e.g., Tokyo Marui, KSC) | From 15°C upwards |
| VAPOR™ Green | 145 PSI | Universal use; metal slides and standard replicas | From 10°C upwards |
| VAPOR™ Red | 188 PSI | High-performance GBB replicas with reinforced internals | From 5°C upwards |
| VAPOR™ Black | 217 PSI | High-power gas rifles; ideal for winter | From 0°C upwards |
Pro Maintenance Tips
Save your Tokyo Marui in summer: You've just spent a lot of money on your beautiful Hi-Capa or Glock Marui with an ABS slide, don't be fooled into putting powerful gas in it in July! In summer, with outdoor temperatures exceeding 30 degrees, a normal 130/140 PSI Green Gas increases in volume and pressure, turning your plastic slide into a fragmentation grenade ready to shatter. Use exclusively this 117 PSI VAPOR Blue (the modern equivalent of the old 134a gas): the firing cycle will be smooth, the recoil crisp enough, and your beloved Japanese replica will live for years without structural damage.
Laser-like aim and manual maintenance: Being a "Silicone-free" gas (completely dry), it will not spray oil droplets onto your hop-up bucking. This means your BBs will fly straight as an arrow from the first shot. However, remember that maintenance is now up to you! Once you return home from the game, disassemble the slide and apply a very light spray of silicone oil or drops to the metal rails, the air nozzle o-ring, and the magazine's output valve, to prevent the seals from drying out over time.