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£2.99
  • 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.

£3.99
  • 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. 

£5.99
  • 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. 

£6.00
  • For Hadron M-TDC
  • Cure Bad Trajectory
  • Greater Spin Control

This is a nub-plate for the latest generation of Hadron Designs' M-TDC Hop Cover. It has two adjustment points instead of one, offering the user greater control over BB spin.

£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.

£11.99
  • High quality Polymer
  • Reinforced Design
  • For TM M4 MWS


A replacement nozzle guide for Tokyo Marui M4 MWS Gas Blowback Airsoft rifles. This nozzle set can be used to strengthen the replica as a more durable upgrade than the existing part. If you're looking to use the MWS at higher than standard FPS then this could be a great upgrade part to handle the increased pressures of more powerful gas.

£11.99
  • For AAP-01
  • Ideal Spare
  • Loading Nozzle

A Polymer constructed Gas/Loading Nozzle for the Action Army AAP-01 Assassin Gas Blowback Airsoft Pistol, which is an ideal spare part to own, and is absolutely vital to the function of the Pistol. If you plan on using Full Auto a lot, then a Spare Nozzle is a must-have, as you don't want to be caught out come skirmish day.

£12.99
  • Aluminium
  • For Army/Marui
  • Improved Compression

An enhanced HOP Unit for Army Armament / Tokyo Marui branded M1911 platform Gas Blowback Replicas, which serves to improve compression and lift achieved from your BBs. It is constructed from Aluminium and comes supplied with the Chamber, HOP Army, Adjustment Wheel, Two Screws and a small O-Ring.

£13.99
  • For AAP-01
  • Ideal Spare
  • Fix Gas Mags

A replacement or spare Outlet / Knocker Valve for the Action Army AAP-01 Assassin Pistol. If you own plenty of Magazines and want to keep them in tip-top condition, then you're going to want a few Knocker Valves spare in your arsenal. They are incredibly easy to install, provided you have an appropriate Valve Key on standby. You can use other tools to install them, but this is not recommended as you could damage the Valve.

£17.25
  • 20mm Rail
  • HOP Modification
  • Twin Screw Adjustment

An updated design of the Top Dead Centre HOP Modification for MK23 NBB Pistols, from Hadron Designs. This awesome bit of kit provides fine Twin Screw control over your HOP adjustment for precision tuning, as well as a top 20mm rail to install sights.

£18.99
  • Military Grade Polymer
  • Upgrade Hop Unit
  • Highly Durable

A military grade polymer replacement for the stock Toyko Marui Airsoft MWS Gas Blowback Rifle hop-up unit designed and built by Angry Gun. This high quality part is an upgrade from the stock one and is perfect for those who are further wanting to upgrade the performance of their replica, or for those who have broken their existing part and are looking to upgrade.

£24.99
  • Holds position securely
  • CNC Machined Parts
  • For High End Builds


A CNC Machined replacement for the stock Toyko Marui Airsoft MWS Gas Blowback Rifle hop-up adjuster designed and built by Angry Gun. This high quality part is an upgrade from the stock one, allowing for finer adjustment and holds its position better. This part is perfect for those who are further wanting to upgrade the performance of their replica, or for those who have broken their existing part and are looking to upgrade.

£27.50
  • 3D Printed
  • 0.4g+ Required
  • Lightweight & Tough

A 3D Printed Outer Barrel Assembly for TM & WE branded EU17/EU18 model GBB Pistols, which offers a TDC Grub Screw HOP style adjustment to increase performance when paired with a quality bucking and heavyweight BBs.

£39.99
  • Reduce Bolt Travel
  • For TM MWS
  • Fast Reset

Tired of the slow bolt travel in your MWS? Want to get that little bit more kick from your GBB? Look no further.

About Our All Gas Blowback Parts

Stock up on vital accessories and upgrade your weapon ahead of a skirmish with our range of gas blowback parts. From feed lips to HOP Rubbers, O-Rings, hammers, complete spares kits and many more, you’ll find it all at Patrol Base.

Ideal for a range of airsoft gun designs, our airsoft gas gun parts are compatible with green gas pistols and CO2 pistols alike, as well as our gas shotguns and beyond. 

Don’t stop there; explore our entire collection of airsoft upgrades and create your dream personalised airsoft replica, from electric internal parts to  inner barrel accessories and AEG springs.

Our airsoft experts are also on hand to provide support with your technical modifications, simply get in touch with our team today.