High Speed BBs

  • Home
  • Real Steel
    • AR-15 Builder
    • About AR-15 Suppressors
    • Suppressor Covers
  • Learn About Airsoft
    • Airsoft Guns
    • How Airsoft Guns Work
    • Airsoft Pistols
    • Airsoft BBs
    • Rifle Scopes
    • Tactical Hand Signals
    • Airsoft Snipers
    • Fix Airsoft Guns
    • Game Rules
    • Airsoft Glossary
    • Play Airsoft
      • Find Airsoft Fields Nearby
      • Best Places to Play Airsoft
      • Top Stores
      • Store Finder
        • States & Cities
        • Store Reviews
      • Field Finder
  • Gun Reviews
    • Best Airsoft Sniper Rifles
    • The Coolest Airsoft Guns
    • Best Glock Pistols
    • Top Airsoft CO2 Pistols
    • Best KWA M4 Airsoft AEGs
    • Top Valken Airsoft AEGs
    • SMG Airsoft Guns <$200
    • Spring Airsoft Guns <$100
  • Gear Reviews
    • Best Airsoft BB Reviews
    • Top Tactical Airsoft Vests
    • MOLLE Pouch Reviews
    • Top-rated Airsoft Masks
    • Best Airsoft Goggles
    • Optimal Field Gear
    • Daily Deals & Discounts
    • Build Your Toolkit
  • Shop
    • Airsoft Rifles
    • Airsoft Pistols
    • Airsoft BBs
    • Airsoft Goggles
    • Airsoft Masks
    • Airsoft Tactical Vests
    • Tactical Pouches
You are here: Home / Airsoft Pistols / Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun
See Airsoft Pistol 1 Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun
See Airsoft Pistol 2 Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun

Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun

Was $119.95 - check current price

Check Out Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun. Find Great Airsoft Pistols, Airsoft Masks, and Gear.

Shop Deal

Highspeedbbs editors select and review airsoft products independently. We may earn affiliate commissions from buying links, which help support our testing. Support us.

SKU: 132c58dd121c Category: Airsoft Pistols Tag: gas airsoft pistol
  • Description
  • Additional information

Description

Airsoft Pistol Product Details

Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun

Airsoft Pistol Product Features

This is a Green Gas Airsoft Pistol which means that it uses Green Gas as a propellant. It shoots hard and fast and is extremely lifelike. One feature many Green Gas Airsoft Guns have is blowback, meaning that as the BB is propelled forward the slide thrusts backward mimicking the kick of a real gun! This Green Gas Airsoft Pistol doesn’t require any pumping just simply point and shoot. This is a high end Green Gas Airsoft gun. Please only use .20 gram high quality BBs with this item in order to keep it in working order. Using anything else as ammunition for this gun will void the warranty and may cause it to jam. You must be 18 years of age or older to purchase this Airsoft gun. You will need to purchase Green Gas for this gun separately.

About Airsoft Handgun Designs

Learn more about airsoft sidearms and handguns and how you can use them as backup guns or as main weapons on the airsoft playing field. Getting the ideal handgun and practicing with it can make all the difference in nailing your shots. Handguns, naturally, are shorter range airsoft guns. They are typically fashioned after firearm pistols or imitations of actual handguns. Many airsoft sidearms are completely licensed reproductions of their genuine handgun counterparts. These airsoft guns can run in the same ways and look similarly to the real guns they are modeled around while shooting airsoft BBs rather than authentic bullets.

There are a few varieties of airsoft sidearms including CO2, green gas or propane (blowback and non-blowback), spring powered, and AEG automatic electric gun handguns. Each of these types of handguns has benefits and differences related to them. Learning more about the kinds of airsoft handguns lets you decide which type is right for you and your airsoft play style.

Details About CO2 Airsoft Pistols

CO2 airsoft handguns are one of the most common and long-lasting types of pistols. These pistols use CO2 stored in small cylinders to launch airsoft BBs out of the pistol barrel.

These types of airsoft pistols are good choices for playing in cooler weather considering that the compressed CO2 gas is stored in the sealed cylinders and less prone to FPS decreases with temperature. This fact gives CO2 airsoft sidearms good FPS and shot consistency while playing airsoft in the winter for instance where other sorts of handguns like green gas cease to work or hardly shoot airsoft BBs.

Additional Info About CO2 Gas and CO2 Cartridges

CO2 airsoft sidearms are powered by conventional 12 gram CO2 cylinders. These cartridges look like a shiny cylinder and store high-pressure CO2 gas composed of one carbon atom and a couple of oxygen atoms for this reason the molecular formula of “C + O2”.

The CO2 gas cartridges cannot be refilled and you can usually purchase them in bundles of 12, 20, 50, or 100 12 gram CO2 cartridges. They come sealed to keep the CO2 gas safely inside, once they are opened (shooting them inside of an airsoft gun breaks the seal) cartridges will begin to lose pressure if they are not expended. You must attempt to deplete the entire CO2 cartridge the exact same day you open the seal. If the airsoft matches end and you still have CO2 gas leftover, use the opportunity to do some pistol accuracy and target practice and use up the remainder of the excess gas. There is no gas level gauge on the cartridge so you need to shoot until the handgun stops shooting BBs.

CO2 cartridges have a long storage life if the cylinders are kept sealed. They do have a supplier’s use by date typically marked on the package or cartridge, however, they will probably last for a very long time past this date if the cartridge seals are not broken.

Green Gas and Propane Airsoft Sidearms

Green gas airsoft handguns are comparable to CO2 pistols, however they use propane gas instead of CO2 cartridges. The result on the battlefield and green gas weapon efficiency is virtually the very same as CO2 pistols with the weapons around 300+ FPS.

The green gas is kept in the handgun’s mag which can frequently hold between 15 to 20+ airsoft BBs depending upon the gun style. A set of valves, rubberized gaskets, and o-rings keep the propane housed in the pistol mag until the pistol’s trigger is pulled. It is a good plan to refill and top off your propane supply in the magazine each time you load it into the pistol. Pistol-wielding airsoft players can additionally take surplus bottles of propane gas in the field for reloading magazines in-between lulls in the battle or in-between activities.

When carrying a green gas sidearm on the airsoft field or arena as a secondary or primary weapon, bringing additional handgun magazines is highly recommended for rapidly reloading and getting back into the game. Having additional magazines on-hand allows you to get back in the action in the course of firefights or while clearing buildings in CQB (close quarters combat) room-to-room fights.

Green gas handguns are optimal for CQB at airsoft fields considering rifles, long guns, and full-sized AEGs are usually not approved to be used during indoor engagements. This is a safety standard due to the close range distance of gamers during shooting engagements and the potential for players to be hurt. While green gas pistols still fire airsoft BBs at around 300 FPS, the shorter pistol barrel assists to keep the joules and energy moving the BB at a lower level compared to AEG airsoft rifles, sniper rifles, and long guns.

Thinking About Green Gas Blowback (GBB) VS Green Gas Non-blowback

There are 2 various varieties of green gas airsoft handguns. There are green gas blowback handguns or GBBs. These guns run like an actual pistol with the slide “blowing back” and cycling with every shot. The propane gas induces the slide to cycle when a new airsoft BB is chambered. The result is really cool, however the GBB guns frequently are more expensive and potentially have more parts to break. The green gas non-blowback airsoft pistols have a stationary slide which does not cycle. The non-blowback weapons typically cost less than GBBs. Efficiency is about the same when comparing the two types of green gas pistols.

About GBB and Green Gas Limitations

Because the green gas or propane gas is held in the handgun mag by rubber o-rings, seals, and gaskets, cold temperatures can negatively affect these seals and allow the stored gas to leak out prior to shooting the gun. The lack of pressure can cause the airsoft BBs to merely shoot a few feet (like 10 feet in the cold ) when the green gas pistol would usually shoot 6mm BBs over 100+ feet in warmer temps).

One option to fix this challenge is to keep the GBB handgun mags warmer by positioning them next to your body prior to game play. This can help to warm up the seals and help to seal in the green gas. If you honestly desire to use a reliable airsoft handgun in the cold, it can also be better to buy a CO2 version of your preferred handgun. The CO2 cartridges come sealed and the gun shoots far better in sub-freezing temperatures and while playing in the snow.

Details About Spring Airsoft Pistols

Spring airsoft handguns are powered by powerful coil springs that propel the BBs down the pistol barrel. They are generally single shot. The manual actions of cocking, shooting, and reloading spring airsoft guns makes the weapon’s fire rate much slower than CO2, green gas, and GBB pistols. This makes spring airsoft pistols enjoyable to use, yet they can be less efficient when encountering competitors on the airsoft field with fully auto airsoft AEG rifles and CO2, green gas, or GBB airsoft pistols.

Spring sidearms work best in springer battles where participants can solely use similar, single shot spring pistols or as a close quarters backup gun for CQB environments when you can frequently quietly sneak up on other airsoft opponents to get a guaranteed one-shot-one-kill. In the latter case, a quick 2nd followup shot isn’t called for due to the fact that the other person is already hit by the first shot and out of the gameplay or moving back to respawn. When engaging a number of attackers considering that the spring gun simply shoots as quick as you can re-chamber an airsoft BB manually, be cautious.

About Spring Pistol Efficiency

Spring guns are extremely useful under the proper game circumstances. Their FPS commonly chronos at about 250 FPS to 300 FPS with 0.12g airsoft BBs. These handguns normally fire the lighter weight airsoft BBs since the coiled springs are less powerful than other styles of airsoft guns like SMGs. Spring pistols can normally shoot up to 120 feet or more with 0.12 gram BBs but the ability to hit targets diminishes rapidly. Shooting standard 0.20g weight airsoft BBs, you will most likely have a decreased shooting distance of around 60 to 80 feet or less with increased target accuracy.

AEG Automatic Electric Airsoft Sidearm Facts

AEG airsoft sidearms or AEPs (automatic electric pistols) are definitely a good choice to use as a secondary weapon on the airsoft field. These automatic electric handguns are normally powered by mini stick batteries in the weapon’s handle. They work much like an AEG gun and use forced air with electrically cycled pistons, gearboxes, and cylinders to propel airsoft BBs out of the barrel and rapidly.

AEG pistol mags usually store around 20 to 30 airsoft BBs. The pistols can shoot airsoft BBs as high as about 300 FPS using 0.12 gram airsoft BBs or around 200 to 250 FPS with 0.20g airsoft BBs. The electrically powered gearbox system can shoot around 700+ BBs per minute which depends if you have enough spare magazines to reload the gun and the battery holds out that long. These AEP handguns can precisely shoot airsoft BBs at about 150 foot ranges.

AEG Handgun Quality and Performance

AEG pistol quality has actually grown substantially recently. The initial generation guns were a little bit questionable and undependable, however the latest versions have most of the deficiencies resolved and make reliable airsoft secondary weapons. They can be upgraded with increased magazine storage capacities and by accommodating larger batteries.

A massive benefit of carrying an AEG pistol is that you have the capability to rewire the battery connectors to use a larger battery. Depending on the AEG pistol design, you can get a huge jump in performance by using a 2 cell Lipo battery (2S Lipo) instead of the stock AEP battery.

What Airsoft Handgun is Right for Me to Play with?

If you have more than one-hundred dollars to spend on your airsoft pistol, take a look at a GBB handgun or AEG handgun. If you have around fifty to one-hundred dollars to invest, evaluate a CO2 pistol or more affordable GBB pistol. You can still find a long lasting airsoft handgun by checking out lower end pistols and by shopping for used pistols if you need to save money.

Airsoft Sidearm Frequently Asked Questions (FAQs)

Question: What is the most popular type of airsoft pistol?
Answer: The best pistols are often a matter of a player’s preference. CO2 and green gas GBB airsoft sidearms usually are the most reliable and dependable. Learn about the different types of airsoft pistols.

Question: What type of airsoft gun is the Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun?
Answer: The Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun is an airsoft pistol.

Question: Is this airsoft pistol good for first time airsoft players?
Answer: This airsoft pistol may be a good option for first time airsoft players. It depends on how much the player has to spend on an airsoft pistol, their experience using handguns, and how much they want to play airsoft. The Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun is a good gun for most players to carry in the field.

Question: Is this airsoft handgun rentable?
Answer: Many airsoft fields rent guns. You will find most fields rent automatic electric guns like SMGs instead of pistols or handguns. Therefore, finding this specific handgun model to use as a rental airsoft gun will probably be more challenging. Check with the airsoft field near you to see if they rent the specific airsoft handgun model.

Question: Can this airsoft sidearm be enhanced with modifications?
Answer: Potentially, this airsoft pistol may be able to accept upgrades depending on the gun type. Look for parts specific to the Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun.

Question: Are airsoft weapons legal in my state?
Answer: Perhaps depending upon where you live. Look at your local gun laws or with your regional law enforcement authority. States like Arkansas (AR), Colorado (CO), Illinois (IL), Maine (ME), Massachusetts (MA), Michigan (MI), Mississippi (MS), New York and New York City (NY), North Dakota (ND), Texas (TX), and Washington D.C. do have stricter laws and requirements which might apply to airsoft weapons like the Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun.

Question: What kind of airsoft BBs does this airsoft gun shoot?
Answer: This airsoft sidearm generally shoots basic 6mm airsoft BBs which are 0.12g or 0.20 gram. Look at the item information for more details.

Question: How far can this airsoft gun shoot?
Answer: Most airsoft pistols can shoot around 80 to 120 feet or more. This may include the Green Gas TSD Caspian 3.8 Pistol FPS-400 Full Metal, Blowback Airsoft Gun. Weapon precision depends on the shooter’s ability, shooting conditions, weather, wind, terrain, and other factors.

Question: What do I need to know for airsoft pistol safety?
Answer: Safety is a top priority when using airsoft guns. Players must always use safety glasses and face masks. The weapon should be used safely with supervision for training in proper environments or for target practice only. You can learn more about safety by reading the airsoft rules of engagement and safety regulations.

Question: Can this airsoft pistol shoot real ammunition?
Answer: No, this airsoft pistol can not fire real ammunition and can not be customized in any way to fire live bullets. It is a toy pistol.

Additional information

Category

Airsoft Pistols

Brand

Airsoft

Feet Per Second (FPS)

400 (With .12g BBs)

Magazine Capacity

25 RDs

Size

8 Inches

Best Sellers

Last update on August 17, 2026 // Source: Amazon API

Customers Also Liked

  • Elite Force Airsoft Pistol 1 Elite Force Beretta 92 FS 6mm BB Pistol Airsoft Gun

    Elite Force Beretta 92 FS 6mm BB Pistol Airsoft Gun

    Was $27.89 - check current price
    Shop Deal
  • BBTac Airsoft Pistol 1 BBTac Airsoft Pistol Handgun Government .45 1911 Spring Loaded Gun

    BBTac Airsoft Pistol Handgun Government .45 1911 Spring Loaded Gun

    Was $15.98 - check current price
    Shop Deal
  • Game Face Airsoft Pistol 1 GameFace ASP311C Stinger P311C Spring-Powered Single-Shot Military-Style Airsoft Pistol, Clear/Black

    GameFace ASP311C Stinger P311C Spring-Powered Single-Shot Military-Style Airsoft Pistol, Clear/Black

    Was $18.43 - check current price
    Shop Deal
  • Elite Force Airsoft Pistol 1 Walther P99 6mm BB Pistol Airsoft Gun Action Kit - Includes 100 BBs and Gel Target

    Walther P99 6mm BB Pistol Airsoft Gun Action Kit – Includes 100 BBs and Gel Target

    Was $26.09 - check current price
    Shop Deal

Our Links

Home
Terms of Service
Privacy Policy
Affiliate Link Policy
FTC Disclosure
Mission Statement
Media Kit
Marketplace
Contact Us

Shop Gear

Shop All
Airsoft Rifles
Airsoft Pistols
Airsoft BBs
Airsoft Goggles
Airsoft Masks
Tactical Vests
Tactical Pouches
Gun Cases

Product Disclaimer

We make great efforts to maintain reliable information on all airsoft and tactical products presented on High Speed BBs. However, the product information listed on highspeedbbs.com is provided without warranty. Users should always check the manufacturer's official website for warranties, user manuals, terms (if any), and product details. The airsoft product offers that appear on the website are from respective airsoft industry companies, suppliers, and stores from which High Speed BBs receives compensation. This compensation may impact how and where products appear on this site (including, for example, the order in which they appear). This site does not include all airsoft products or all available product offers.

Amazon Associate Disclosure

Amazon Disclosure: Highspeedbbs is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. FTC Disclosure: Some links may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. You can learn more about this from our affiliate policy, terms of service, and privacy policy.

Brand Disclosure

Brand Disclosure: Product names, logos, brands, and other trademarks featured or referred to within our content and website are the intellectual property of their respective trademark holders. Any reference in this website to third party trademarks, brands, or logos is to identify the corresponding third party goods and/or services.

© 2026 HighSpeed BBs. All Rights Reserved