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  • For GHK G5
  • Very Important Part
  • Stopping Point For Nozzle

A very vital piece of a GHK G5 Gas Blowback Rifle, and is an ideal spare part to own in case the worst should happen come game day.

£1.99
  • CO2 Pistol Use
  • Light Lube Required
  • Spares Replacement Kit

An ideal replacement for any low powered or leaking CO2 pistols and revolvers produced by ASG. 

£3.99
  • For 4.5mm / 6mm
  • For Repairing Pistol
  • Great Spare Part Kit

Spare parts kit designed for use with ASG's Raid 400, Thunder 9, and M9-A1 Series of pistols, for both the 4.5mm Airgun and 6mm Airsoft Variants. The set contains four Parts, Two Sizes of Valve Seal, a Valve Ring and Piercer Seal. 

£5.99
  • 70 Degree Hardness
  • For 2012 LM4 GBBR Designs
  • Purpose Designed KSC / KWA

A high quality replacement Hop Up rubber designed specifically for the Airsoft replica LM4 Gas Blowback Rifle. This particular rubber is intended for use specifically in those LM4 GBBRs manufactured to the 2012 design by KSC and KWA MAGPUL.

£5.99
  • Silicone Rubber
  • For System 7 Pistols
  • KWA & KWC Compatible

A replacement Hop Up Rubber designed specifically for use with KSC and KWA's System 7 line of Gas Blowback Airsoft Pistols. 

£5.99
  • For Bersa Series
  • Great Spare Part Kit
  • For Pistol & Magazine

A pack of replacement seals for ASG's Bersa series of pistols.

£5.99
  • For ASG Tac-6
  • For 4.5mm / 6mm
  • Great Spare Part Kit

Spare parts kit designed for use with ASG's TAC-6 Series of rifles, for both the 4.5mm Airgun and 6mm Airsoft Variants. The set contains Six Parts, the Valve Ring, the Valve Seal, Piercer Seal, Thin and Small O-Rings and a Spacer.

£6.99
  • 75 Degree Toughness
  • Monster / Diamond Design
  • For KSC Gas Blowback Guns

A replacement Hop Up Rubber designed specifically for use with KSC's line of Gas Blowback Airsoft guns. 

£6.99
  • For 90m/s to 120m/s
  • For Long Range Shots
  • 50-80 Degree Rubbers

A replacement Hop-Up rubber for the WE / NUPROL Range of Gas Blowback Airsoft Pistols specially designed with internal rubber ridges to add range over a standard hop-up rubber. 

£6.99
  • For 90m/s to 120m/s
  • For Long Range Shots
  • 50-80 Degree Rubbers

A replacement Hop-Up rubber for the WE / NUPROL Range of Gas Blowback Airsoft Pistols specially designed with internal rubber ridges to add range over a standard hop-up rubber. 

£6.99
  • For 90m/s to 120m/s
  • For Long Range Shots
  • 50-80 Degree Rubbers

A replacement Hop-Up rubber for the WE / NUPROL Range of Gas Blowback Airsoft Pistols specially designed with internal rubber ridges to add range over a standard hop-up rubber. 

£6.99
  • Wide Flat Patch
  • For KSC GBB Style Barrels
  • Variable Degrees Of Hardness

An absolute monster of an upgrade to make to your weapon. The external surface is ribbed to keep your inner barrel more stable inside your hop up unit with next to no play at all after you have fully re-assembled your Airsoft weapon.

£6.99
  • Wide Flat Patch
  • For KSC GBB Style Barrels
  • Variable Degrees Of Hardness

An absolute monster of an upgrade to make to your weapon. The external surface is ribbed to keep your inner barrel more stable inside your hop up unit with next to no play at all after you have fully re-assembled your Airsoft weapon.

£6.99
  • Ideal Spare Part
  • Fix Gas Leak Issues
  • For TM870 / Breacher

A high quality original replacement O-Ring for the TM870 and TM Breacher to help fix gas leak issues where the grip meets the body of the weapon.

£6.99
  • WE GBB Pistols
  • Wide Flat Patch
  • 80 Degrees Of Hardness

A hop rubber for most WE Pistols, an absolute monster of an upgrade to make to your weapon.

£6.99
  • For 0.4g BBs +
  • Silicon Construction
  • For VSR-10 / KJW / WE 


A high quality replacement Hop up rubber, made to 70 degrees of hardness, and designed for VSRs, as well as KJW and WE Airsoft designs.

£8.95
  • Stronger Recoil
  • Snappier Response
  • Easy Drop In Replacement

An uprated spring set for the upper slide of your Marui Hi-Capa 4.3. The enhanced recoil spring set will improve the response of your pistol.

£8.99
  • Basic Spares Kit
  • Repair Your HPA M4
  • Maintenance Essentials

A basic spare parts & maintenance kit for the Tippmann M4 HPA blowback rifle.

£11.99
  • For WE Pistol Magazines
  • Enough For 8 Magazines
  • Compartment Storage Tray

A handy kit created for nearly all WE pistol gas Airsoft magazines. This kit is designed to allow you to replace your existing o-rings which are damaged or worn to bring them back to brand new condition, and give your magazine a new lease of life!

£11.99
  • CNC Machined
  • Reduces Gas Flow
  • Reduces Power by 10/20/30%

Power restrictor discs for Umarex & VFC models of MP7 GBB weapons. The velocity is reduced by 10%, 20% or 30% depending on which disc is installed.

£11.99
  • Semi-Automatic Version
  • For WE Europe EU17 & EU34
  • Complete Hammer Assembly

Fresh from WE Europe's factory, this is a complete drop-in replacement hammer assembly for the EU17 and EU34 series of gas blowback Airsoft pistols. 

£15.99
  • Select Fire Version
  • For WE Europe EU18 & EU35
  • Complete Hammer Assembly

Fresh from WE Europe's factory, this is a complete drop-in replacement hammer assembly for the EU18 and EU35 series of gas blowback Airsoft pistols. 

£15.99
  • CNC Machined
  • Improved RIF Reliability
  • Increased Gas Efficiency

A high quality Rocket Valve for KSC branded M4/G-Series/USPs manufactured by Angel Custom out of CNC Stainless Steel. The benefits of an uprated Rocket Valve are increased and more stable FPS thanks to more precise engineering and denser materials.

£17.99
  • Easy to Install
  • OEM Replacement
  • Good Spare to Own

A complete kit to resolve 99% of gas inefficiency and leaking problems throughout your pistol. 

£19.99
  • Increase power (140%)
  • For KWA LM4/PTS MKM
  • Polycarbonate Construction


    Designed by KWA for use in the KWA and PTS Mega Arms LM4 / MKM gas blowback Airsoft guns, these high quality replacement nozzles are manufactured from extremely durable polycarbonate, and offer users the ability to enhance their Airsoft gun's presssure and FPS. 

    £24.99
    • Quick Fitting
    • Aluminium Design
    • For TIPPMANN M4


    A replacement Selector Switch designed to be installed in TIPPMANN M4 HPA Rifles, to allow the changing of the weapons fire mode for left handed shooters. The selector is constructed from Alloy, quickly fitted to your TIPPMAN rifle to make it ambidextrous. 

    £29.99
    • Drop-In Set
    • 50° Bucking
    • 6.01mm Barrel

    A drop-in upgrade barrel and hop unit for Marui, WE & KJ Works Hi-Capa GBB pistols with a 50° bucking.

    £39.99
    • Drop-In System
    • Reduces 60-70fps
    • Alloy Construction

    Drop in and play downgrade for all KWA / ASG MP9 Gas Blowback Airsoft 6mm BB Guns. The Bolt is constructed from Alloy, making it durable and long lasting, and has been specifically designed to drop the FPS of the weapon by around 50-70 fps making it Site Legal for most Skirmish Sites in the UK. 

    £44.99
    • Easy to Install
    • OEM Replacement
    • Useful Part to Own

    Direct factory OEM replacement feed lips for WE Europe's G-Series range gas blowback pistols, that are constructed from polymer to the same spec as the original part.

    £2.99
    • High Quality O-Rings
    • Convert To Silent Fill
    • For WE Pistol Magazine

    A handy kit for replacing the O-rings on a WE Hi-Power.

    £2.99

    More Bang and less Hiss...

    Upgrades and replacement parts for the inside of your Gas Blowback Airsoft Weapons. Here at Patrol Base Airsoft we stock a wide range of OEM Manufacturer Replacement Parts, as well as various Aftermarket Upgrade Parts designed to enhance the performance of your Airsoft Gun.

    We stock a range of Parts and Upgrades for Gas Pistols, Rifles, and Submachine Guns allowing you to tweak your weapon to perfection. Our parts allow you to increase your Accuracy, improve the Recoil of your weapon, and make them more Gas Efficient.

    We have Internal Parts available from all the best manafactuerers, such as Tokyo Marui, ASG Action Sport Games, WE Europe, Nuprol, King Amrs, LCT and more, following our golden rule, if we wouldn't use it, we won't sell it!

    If you can't find something that you like, or want something which isn't on the website why not contact us via Phone and we can do our best to source it for you!
    Telephone: 01484 644709