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 / CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs)
See Airsoft Pistol 1 CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs)

CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs)

Was $60.00 - check current price

Check Out CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs). 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: 0058db373a9d Category: Airsoft Pistols Tag: airsoft package deal
  • Description
  • Additional information

Description

Airsoft Pistol Product Details

CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs)

Airsoft Pistol Product Features

This is a CO2 powered Airsoft Pistol which means that it uses CO2 Gas as a propellant. It shoots hard and fast and is extremely lifelike. One feature many CO2 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 CO2 Airsoft Pistol doesn’t require any pumping just simply point and shoot. This is a high end CO2 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.

How to Pick an Airsoft Pistol

Learn more about airsoft sidearms, pistols, and handguns and how you can use them as backup guns or as primary weapons on the airsoft playing field. Getting the best pistol and practicing with it can make a big difference in nailing your shots. Sidearms, by nature, are reduced range airsoft weapons. They are normally created after real world sidearms or clones of genuine pistols. Quite a few airsoft sidearms are completely certified releases of their authentic weapon equivalents. These airsoft guns can appear and function (except for shooting bullets) in the same ways almost identically to the real guns they are designed after while shooting airsoft BBs instead of actual bullets.

There are a few varieties of airsoft handguns such as CO2, green gas or propane (blowback and non-blowback), spring powered, and AEG automatic electric gun sidearms. Each of these forms of pistols come with positives and negatives connected with them. Learning more about the styles of airsoft sidearms helps you choose which type is right for you and your airsoft play style.

Details About CO2 Airsoft Sidearms

CO2 airsoft sidearms are among the most tough and typical styles of pistols. They are all-weather weapons working well in a lot of types of temperatures, weather and environments. These sidearms use pressurized CO2 gas to force airsoft BBs out of the gun barrel. The CO2 cartridge stores the gas within the cylinder and is normally stored in the handgun’s mag inside the handle.

These styles of airsoft guns are very good for airsoft games in cooler temperatures considering that the compressed CO2 gas is stored in the sealed cylinders and less susceptible to FPS decreases by low temperature. This fact offers good FPS and shot consistency while playing airsoft in the winter months for example where other types of pistols like green gas stuffer from low performance or hardly shoot pellets.

Information About CO2 Gas and CO2 Cartridge Cylinders

CO2 airsoft sidearms are powered by typical 12 gram CO2 cartridge cylinders. These cartridges look similar to a metallic cylinder and contain high-pressure CO2 gas comprised of 1 carbon atom and 2 oxygen atoms, consequently the molecular formula is “C + O2 “. These atoms are bonded in the following order “O= C =O”. The gas is held in the 12 gram cylinders under very high pressure of roughly ~ 800psi that converts to 55bar.

The CO2 cylinders are not reusable and you can commonly purchase them in bundles of 12, 20, 50, or 100 12 gram CO2 cartridges. They come sealed to keep the CO2 gas safely inside, but when they are punctured (firing them inside of an airsoft weapon breaks the cartridge seal) the cartridges will begin to lose pressure if they are left unused. You must try to burn up the entire CO2 cartridge the very same day you open the seal. Use the opportunity to do some pistol target practice and use up the rest of the extra gas if the airsoft matches end and you still have CO2 gas left. There is no gas level guide on the cartridge so you have to shoot until the weapon stops firing airsoft BBs.

CO2 cartridges have a long storage life if the cylinders are stored sealed. They do have a manufacturer’s use by date usually marked on the package or cartridge, however, they will survive for a long period past this date if the cartridge seals are not punctured.

Info About Green Gas Airsoft Handguns

Green gas airsoft pistols function similarly to CO2 guns, however they do not use CO2 cartridges. Instead, they use green gas or propane for propellant to shoot the airsoft pellets. The outcome on the airsoft battlefield and green gas handgun performance is basically the same as CO2 handguns with the weapons shooting up to 300+ FPS. Shots are efficiently fired in semi-automatic or fully-automatic firing modes and can accurately hit targets at shorter to mid-range distances.

The green gas is held in the handgun’s mag and can often hold roughly 15 to 20+ airsoft BBs based on the gun model. A sequence of valves, rubber gaskets, and o-rings keep the propane housed in the pistol magazine up until the handgun’s trigger is squeezed. It is a good idea to fill up and top off the propane reserves in the pistol mag each time you reload it. Pistol-wielding players can even carry additional bottles of propane in the field for reloading magazines between lulls in the war or between activities.

When bringing a green gas handgun on the airsoft field as a backup or primary weapon, additional handgun mags are highly recommended for rapidly reloading and engaging the op force. Having additional magazines helps you re engage in the action throughout firefights or while sweeping structures in CQB (close quarters combat) room-to-room fighting.

Green gas handguns are optimal for CQB at airsoft fields considering long guns and full-sized AEGs are generally not authorized to be used for indoor game play. This is an essential safety rule due to the close range proximity of players during shooting engagements. While green gas pistols still fire airsoft BBs at about 300 FPS, the short handgun barrel assists to keep the joules and energy launching the BB lower compared to AEGs, airsoft rifles, sniper rifles, and other long guns.

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

There are two various sorts of green gas airsoft handguns. There are green gas blowback pistols or GBBs where the slide moves and non-blowback handguns. The green gas non-blowback airsoft handguns use a fixed slide which does not move.

About GBB and Green Gas Limitations

Due to the fact that the green gas or propane is stored in the pistol magazine using rubber o-rings, seals, and silicone gaskets, cold temps can negatively influence these seals and cause the stored gas to escape prior to shooting. This can cause the airsoft BBs to only land a few feet away (like 10 feet in cold weather ) when the green gas handgun would typically shoot BBs over 100+ feet in warmer temps).

One option to this problem is to keep the GBB pistol magazines warmer by positioning them next to your body before the airsoft game play. If you absolutely want to play with a trustworthy airsoft pistol in the cold weather, it may additionally be worth getting a CO2 style of your preferred handgun.

Facts About Spring Airsoft Pistols

Spring airsoft pistols are powered by powerful springs that fire the BBs out of the pistol barrel. The manual functioning of cocking, shooting, and reloading spring guns makes the fire rate much slower than CO2 and GBB guns.

Spring sidearms work the best in springer wars where participants can exclusively use similar, single shot spring weapons or as a transition backup weapon for CQB environments when you can usually quietly sneak up on other airsoft players to get an assured one-shot-one-kill. In the latter situation, a quick second followup shot isn’t required due to the fact that the other opponent is now hit by the airsoft BB and out of the game play or heading back to respawn. When engaging many different adversaries given that the spring airsoft gun only fires as quick as you can re-chamber an airsoft BB by hand, be careful.

About Spring Handgun Performance

Spring guns are really efficient under the correct conditions during games. Spring pistols can normally fire up to 120 feet or farther with 0.12 gram BBs however accuracy reduces quickly.

AEG Automatic Electric Airsoft Sidearm Info

AEG airsoft pistols or AEPs (automatic electric pistols) are definitely a viable option to bring as a backup weapon on the airsoft field. These automatic electric handguns are often powered by mini stick batteries in the pistol’s butt. They function just like an AEG SMG and use pressured air pumped through electrically cycled gearboxes and cylinders to fire airsoft BBs out of the barrel and rapidly.

AEG handgun magazines normally can carry about 20 to 30 airsoft BBs. The handguns can shoot airsoft BBs up to around 300 FPS using 0.12g airsoft BBs or 200 to 250 FPS with 0.20g airsoft BBs.

AEG Handgun Quality and Performance

AEG pistol quality has grown substantially recently. The earliest generations were a little bit undependable and questionable, but the more recent versions have the issues worked out and make efficient airsoft secondary guns. They can be improved with maximized magazine capacities as well as accommodating more powerful batteries.

A large perk of carrying an AEG pistol is that you have the capacity to rewire the connectors to use an enhanced battery with higher mAh. Depending on the AEG handgun style, you are able to get a big leap in performance and fire rate using a two cell Lipo battery (2S Lipo) as a replacement for the stock mini battery. Take extra precautions when customizing the elements and the gun’s wires because you have to take into account the volts, mAh, and loads of the battery. Ask a pro gun tech at your local airsoft store if you have customization questions.

Which Airsoft Handgun is Right for Me?

Finding the most ideal airsoft pistol for you depends on your gun budget, how much you want to play airsoft using it, and where you hope to play. If you have over one-hundred dollars to spend on your airsoft handgun, look at a green gas blowback handgun or AEG handgun. These kinds of pistols are normally the best of the best, have great performance, and can be a really good gun to invest in. Look at a CO2 handgun or cheaper green gas GBB handgun if you have about more than $50 but less than $100 to spend. These mid-tier guns will still finish the job and can be pretty long lasting sidearms. If you have $50 or less, search for a cheap CO2 or spring pistol. You can still find a dependable airsoft pistol to use for the handgun games.

Frequently Asked Questions About Airsoft Handguns

Question: What is the best type of airsoft handgun?
Answer: The best pistols are often a matter of a player’s preference. CO2 and GBB airsoft pistols usually are the most durable and effective on the airsoft field. Learn about the different types of airsoft pistols.

Question: What type of airsoft weapon is the CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs)?
Answer: The CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs) is an airsoft pistol.

Question: Is this airsoft pistol good for first time players?
Answer: This airsoft pistol may be a viable gun to use for first time airsoft players. It depends on how much the player has to spend on an airsoft pistol, their experience shooting handguns, and how much they think they will play airsoft. The CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs) is a good sidearm for many players to play airsoft with.

Question: Is this airsoft gun rentable?
Answer: Lots of airsoft fields rent weapons. You will find most fields rent automatic electric guns like SMGs instead of pistols or handguns. Therefore, finding this specific pistol model to rent at an airsoft field will most likely be more challenging. Talk to your closest airsoft field near you to see if they rent the specific gun model.

Question: Can this airsoft sidearm be enhanced with modifications?
Answer: Potentially, this airsoft handgun may be able to accept upgrades depending on the gun type. Try to find parts particular to the CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs).

Question: Are airsoft weapons legal in my state?
Answer: Possibly depending upon where you live. Check your regional 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 more stringent laws and requirements which may apply to airsoft guns like the CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs).

Question: What kind of airsoft BBs does this airsoft pistol shoot?
Answer: This airsoft sidearm typically shoots basic 6mm airsoft BBs which are 0.12g or 0.20 gram. Check the handgun’s information for additional information.

Question: How far can this airsoft handgun shoot?
Answer: Many airsoft handguns can shoot around 80 to 120 feet or more. This may include the CO2 TSD Sports Clear M9 Bull Mastiff Pistol FPS-400 Airsoft Gun Package Deal (Mask, CO2 and BBs). Gun range depends upon the shooter’s ability, shooting conditions, weather, wind, terrain, and other factors.

Question: What do I need to understand for airsoft handgun safety?
Answer: Safety is a top concern when using airsoft pistols. Participants must constantly use safety goggles and face protection. The weapon needs to be used safely with guidance 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 fire real ammunition?
Answer: No, this airsoft handgun can not fire real bullets and can not be customized in any way to fire live ammunition. It is a toy weapon.

Additional information

Category

Airsoft Pistols

Brand

Airsoft

Feet Per Second (FPS)

440 Using .12g BBs (350 to 400 FPS Using .20g BBs)

Magazine Capacity

15

Size

9 Inches Long

Weight

1.1 lbs

Best Sellers

Last update on October 3, 2026 // Source: Amazon API

Customers Also Liked

  • BBTac Airsoft Pistol 1 BBTac Airsoft Spy Handgun - Twin Pack Pocket Pistol Gun with Storage Case (Gold & Black)

    BBTac Airsoft Spy Handgun – Twin Pack Pocket Pistol Gun with Storage Case (Gold & Black)

    Was $14.99 - check current price
    Shop Deal
  • Game Face Airsoft Pistol 1 GameFace ASP311CDK Spring-Powered Single-Shot Airsoft Pistol Kit With 2 Pistols, Target And BBs, Clear/Black

    GameFace ASP311CDK Spring-Powered Single-Shot Airsoft Pistol Kit With 2 Pistols, Target And BBs, Clear/Black

    Was $42.57 - check current price
    Shop Deal
  • TSD Airsoft Pistol 1 TSD Sports UA938S 6 Inch Spring Powered Airsoft Revolver (Silver)

    TSD Sports UA938S 6 Inch Spring Powered Airsoft Revolver (Silver)

    Was $28.49 - check current price
    Shop Deal
  • Game Face Airsoft Pistol 1 Game Face Stinger P311 Airsoft Pistol

    GameFace ASP311B Stinger P311B Spring-Powered Single-Shot Military-Style Airsoft Pistol, Black

    Was $18.19 - 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