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From £16.99
  • Double O-Ring
  • Aircraft Aluminium
  • Concave Intake

A series of Aluminium Alloy constructed Cylinder Heads for a range of Airsoft Electric Guns, produced with double o-ring sealing for improve air seal and accurately CNC produced for an accurate and reliable build.

£18.99
  • 7 Steel Teeth
  • Reinforced Teeth
  • High Speed & Power

A Polycarbonate constructed Piston for high-speed or power applications, suitable for most Tokyo Marui AEGs.

£18.99
  • 7 Steel Teeth
  • Reinforced Teeth
  • 2nd Tooth Removed

A Polycarbonate constructed Piston for high-speed applications, suitable for most Tokyo Marui AEGs.

From £6.99
  • For Marui AEG
  • Thermally Treated
  • Steel Construction

A series of Steel manufactured Motor Pinion Gears for either the TOP M60/M249 or Tokyo Marui AEG motors.

£24.99
  • Low Friction
  • Stainless Steel
  • Convex Surface

A set of Tempered Stainless Bushings for 6mm or 7mm gearboxes from Modify.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£26.99
  • 2 x HOP Arms
  • Alloy Construction
  • Accurate Adjustments

A series of very precise and Alloy constructed HOP chambers for either M4 or AK platform replicas. Both are supplied with two types of HOP Arms.

£27.99
  • CNC Machined
  • Consistent Pressure
  • Anodised Aluminium

A CNC machined Aluminium Hop Arm / Pressure Plate for the Modify MOD24 Bolt Action Sniper Rifle.

£29.99
  • GBB Barrel
  • Stainless Steel
  • Rigid & Accurate

A Precision Inner Barrel for Gas Blowback Pistols and compact Airsoft weapons, produced to an incredibly high standard of tightbore performance increasing your range and accuracy over distance.

£29.99
  • Low Resistance
  • Switch Assembly
  • Mini Tamiya Plug

A complete Switch Assembly for a variety of AEGs, which includes Low Resistance Wiring with either a Mini Tamiya or Deans Connector on the end.

£29.99
  • 30rnd Capacity
  • For Modify M24
  • Without LED Box

A spare 30rnd magazine for the Modify MOD24 Spring Rifle.

£29.99
  • Bearing Mounted
  • Steel Construction
  • Works Up To M170

A Steel constructed Spring Guide, available for a range of Airsoft replicas and featuring a bearing-mounted design. Withstand upgraded spring power and rate of fire upgrades all day long.

£29.99
  • Tempered
  • Stainless Steel
  • Installation Tools

A set of tempered Bushings from Modify which comes included with installation tools.

£36.99
  • Stainless Steel
  • Air-Seal Improving
  • Aircraft Aluminium

An extremely straight and precisely-manufactured inner barrel made from Stainless Steel and Aircraft-grade Aluminium, and comes included with a HOP rubber and O-Rings.

£36.99
  • Stainless Steel
  • Air-Seal Improving
  • Aircraft Aluminium

An extremely straight and precisely-manufactured inner barrel made from Stainless Steel and Aircraft-grade Aluminium, and comes included with a HOP rubber and O-Rings.

£36.99
  • Stainless Steel
  • Air-Seal Improving
  • Aircraft Aluminium

An extremely straight and precisely-manufactured inner barrel made from Stainless Steel and Aircraft-grade Aluminium, and comes included with a HOP rubber and O-Rings.

£36.99
  • Anodised Finish
  • 6.03mm Inner Diameter
  • Aluminium Construction

An aluminium Precision Inner Barrel for your Spring Sniper Rifle, with an inner diameter of 6.03mm.

£44.99
  • 16.32:1 Ratio
  • For Version 2/3/6
  • Steel Construction

A high-quality range of gear sets for Version 2/3/6 Airsoft gearboxes, choose from a range of gear ratios to support high FPS and high rate of fire builds.

£44.99
  • 16.32:1 Ratio
  • For Version 2/3/6
  • Steel Construction

A high-quality range of gear sets for Version 2/3/6 Airsoft gearboxes, choose from a range of gear ratios to support high FPS and high rate of fire builds.

£49.99
  • 16.32:1 Ratio
  • For Version 2/3/6
  • Steel Construction

A high-quality range of gear sets for Version 2/3/6 Airsoft gearboxes, choose from a range of gear ratios to support high FPS and high rate of fire builds.

£59.99
Was £94.99
Save £35.00
  • Smooth Operator
  • Steel Construction
  • Bearings Pre-Mounted

A Steel constructed drop in gear set with no shimming required! Delivering a smooth operation with a ratio of 21.6:1, which comes included with an Anti-Reversal Latch and Gear Key.

£59.99
  • Reinforced Casing
  • Assembly Tools Inc.
  • Reinforced Tappet Plate

If you're looking to build a high speed or high FPS setup then you've come to the right place. MODIFY's latest casings come in Version 2 and Version 3 options in either 7mm or 8mm form.

£59.99
  • CO2 Magazine
  • 21rnd Capacity
  • For Modify PP-2K

A spare or replacement CO2 Magazine for the Modify PP-2K (PP-2000), holding a total of 21rnds and accepting a 12g CO2 Sparklet. This CO2 Magazine will provide a stronger kick/recoil and much better cold-weather performance. Especially in Winter-conditions, a CO2 Magazine is essential to reliable operation. If you run one of these fantastic SMGs and need more Magazines to feed your addiction, then this is an essential purchase.

The right gun makes a player a sharpshooter

From watchmakers to Airsoft parts manufacturers, you can guarantee the quality of the parts when you know the exact same people make boutique watch parts. Modify can make an average Airsoft gun phenomenal thanks to the precision manufacturing of their unique parts.

Known for the expertise in manufacturing precision parts Modify aims to help Airsoft technicians to make Airsoft guns and parts which are user friendly, highly accurate and most importantly, built to impress players and gunsmiths alike. 

Modify are so well known for their parts, that they are commonly used as a starting point for many well known Airsoft replicas, including Sniper Rifles, Pistols, Assault rifles and more.

Here at Patrol Base we stock a wide range of Modify Upgrade parts and Airsoft Guns. Fancy yourself a budding Airsoft Tech? Take your guns to the next level by fitting Modify parts, don't waste your time with lower quality parts, go right for the good stuff. If you want to check out the parts first hand why not visit our UK based Airsoft shop, located in Huddersfield between Leeds and Manchester and get hands on experience with our workshop staff.