Airsoft Hop Up Units & Buckings

If you're the techy type and want to maximise your AEG's efficiency, the Bolster Armouries HOP-up to Barrel O-Ring Shim Set belongs in your toolbox! This set includes 10 o-rings designed to fit around the HOP-up unit and inner barrel, forcing it back to meet the gearbox as seamlessly as possible to promote maximum efficiency and reduce shot-to-shot FPS deviation. 

This set is designed to replace the "one size fits all" HOP-up unit spring, providing a user-customisable solution to account for manufacturing tolerances. While this will take a bit of trial and error to get the perfect fit for your AEG it should prevent airseal qualities from reducing over time and avoid that annoying realisation that you forgot to reinstall the HOP-up spring after upgrading or maintenance! 

The Bolster Armouries HOP-up to Barrel O-Ring Shim set should fit almost every AEG on the market and you probably won't need to use the full set, meaning you might even be able to replace two HOP-up springs with a single set. 

Turn your stock ASG Scorpion EVO's HOP-up chamber to a TDC design without having to replace the whole unit. This kit includes everything you need to install the system into your current HOP-up chamber. It is compatible ONLY with ASG Scorpion EVOs and will not fit in any other HOP-up systems.

TDC (Top-Down-Centre) HOP units are incredibly sought after due to the increased friction they add to BBs, which increases the effectiveness of the HOP applied to your BBs. By installing TDC to the stock HOP-up you are guaranteed compatibility with the platform.

The set also includes rubber nubs, these ensure the HOP is stable while BBs accelerate through the unit, further improving the performance and consistency of your ASG Scorpion EVO. This is a very complex installation process and we only recommend it if you are confident in your understanding and ability to fit it to your HOP-up chamber.

Designed specifically for the Gate EON CNC Rotary HOP-up chamber, the Airtech Studios Full Upgrade Set for Gate EON HOP-up Chamber includes a TDC trolley, 2 x M-nubs and an inner barrel centring unit. This set is designed to convert the Gate EON into a true TDC unit, giving you more range and accuracy than ever before!

The benefits of a TDC HOP-up unit include a stronger HOP-up effect and less chance of side-to-side shot deviation when using heavy BBs at high FPS. This part will require a certain amount of expertise to install but thankfully, the process is fully explained on the Airtech Studios website. If you want to get the most out of your Gate EON HOP-up chamber, this kit will do the trick!

If you're working on a beast of a sniper rifle, the Trusight TDC Conversion Kit for VSR-10 will get you there! This TDC HOP-up conversion set is a very impressive design, providing TDC functionality for reduced side-to-side deviation and a stronger HOP-up effect without requiring your outer barrel to be drilled!

That said, limited modifications to the TDC carrier are required due to purposely being made off-spec. This allows you to get the perfect fit for your specific HOP-up chamber by carefully filing it down with hand files. Installation instructions are available on the Trusight Website but for those who don't like reading, check out the video here.

The main benefits of this set over other TDC kits are it doesn't require any permanent modifications to your original VSR-10 parts and you won't need to carry an Allen key in-game or ruin the looks of your VSR with a dial on the top of the barrel as you'll be using the original slider adjuster. Compatibility-wise, this set is designed specifically for the Tokyo Marui VSR-10 series but may also fit VSR-10 clones, though extra modification may be needed for a perfect fit.

If you're running one of the newer G&G platforms with the G&G rotary HOP-up, check this out! The Airtech Studios TDC Conversion Set for G&G Rotary HOP-up Unit is intended to provide maximum performance from your original G&G rotary HOP-up unit. Designed specifically for the latest G&G rotary HOP-up design, this kit includes an enhanced HOP-up arm, TDC trolley, 2 x M-nubs and a centring unit.

The benefits of a TDC HOP-up unit include a stronger HOP-up effect and less chance of side-to-side shot deviation when using heavy BBs at high FPS. This part will require modification to your original outer barrel to fit, but thankfully these mods are quite easy and thoroughly explained on the Airtech Studios website. If you want your G&G Rotary-equipped AEG to reach out and touch the enemy at crazy ranges, this TDC Conversion Set is what you need!

A soft Hop Rubber for Marui compatible AEGs offering an air-tight design, which comes supplied with a nub and is a purple colour.

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

Whether you're building a DMR or simply want more range from your standard AEG, an R-HOP kit can make all the difference. Unlike other R-HOP kits on the market, the Trusight Tru-Hop Gen.3 is designed to be effectively a drop-in installation, with no need for adding patches of various sizes and includes both the HOP-up bucking and a concave HOP-up nub.

The set is designed to be widely compatible and should fit most Airsoft AEG spec inner barrels, though due to its enlarged contact patch, it will only work with inner barrels with a window measuring approximately 5mm in length x 1.7mm in depth. If you are happy to get stuck in with your AEG internals and you're looking for range and accuracy improvements, the Trusight Tru-Hop Gen.3 Hop-Up Rubber is what you need!

If you're building a DMR or accurised AEG, the Delta Armory BERSERKER R-Hop Bucking Bundle for AEG is what you need to achieve maximum range. This set includes an enhanced HOP-up arm, HOP-up bucking and OMEGA-style nub manufactured for Delta by upgrade legends Psionic Upgrades. The included HOP-up arm is designed for M4/AR-15 AEG rotary HOP-up units, specifically the Delta Armory/Specna Arms/Evolution/Lancer Tactical type but the bucking and nub are compatible with other Airsoft AEGs of all different shapes and sizes. 

The inner patch of the BERSERKER bucking is shaped to fill the HOP-up window on your barrel, just like home-brewed R-HOP setups of old. The advantage of using a BERSERKER set rather than doing all the mods yourself is its simple drop-in installation, low price compared to sourcing a separate bucking, nub and HOP-up arm and guaranteed compatibility, meaning no chance your nub doesn't work with your chosen bucking. If you use heavy BBs and need a range increase, this set will do exactly that!

If you're building your M4/AR-15 AEG to focus on range, accuracy and efficiency, the RetroArms CNC Rotary HOP-Up Chamber Gen.2 for M4/AR-15 AEG belongs in your build. This set is a full replacement rotary type HOP-Up unit for version 2 gearbox-equipped Airsoft M4/AR-15 platform AEGs and includes all of the parts you'll need to replace your stock HOP-up unit. The set also includes the choice of two HOP-up arms, one designed for flat HOP setups and one for conventional.

As with all internal upgrade parts, we only recommend this HOP-up unit for the technically proficient as it requires full assembly and does not include a HOP-up rubber or HOP-up nub. That said, the RetroArms CNC Rotary HOP-Up Chamber Gen.2 for M4/AR-15 AEG is widely regarded as one of the best options out there for the pros, and when set up properly, it has the potential to outrange anything else on site!

If you're looking for accuracy improvements for your M4/AR-15 AEG, the Delta Armory TRINITY R-Hop Bucking Bundle for AEG is what you need to tighten your groupings. This set includes an enhanced HOP-up arm, HOP-up bucking and OMEGA-style nub manufactured for Delta by upgrade legends Psionic Upgrades. The included HOP-up arm is designed for M4/AR-15 AEG rotary HOP-up units, specifically the Delta Armory/Specna Arms/Evolution/Lancer Tactical type but the bucking and nub are compatible with other Airsoft AEGs of all different shapes and sizes. 

The inner patch of the TRINITY bucking is diamond-shaped, similar to the Maple Leaf Super bucking, intended to improve accuracy by applying backspin more consistently. The advantage of using a TRINITY set rather than doing all the mods yourself is its simple drop-in installation, low price compared to sourcing a separate bucking, nub and HOP-up arm and guaranteed compatibility, meaning no chance your nub doesn't work with your chosen bucking. If you're looking for tighter groupings from your Airsoft AEG, the TRINITY R-HOP Bucking Bundle is the one to go for!

If you want to tighten your groupings and get maximum accuracy from your GBB or VSR setup, the Maple Leaf 2023 Decepticon HOP-up Bucking for VSR/GBB is the HOP-up rubber you need! Also known as the "Desepticons" bucking by Maple Leaf, this is the 2023 version with a refined shape and packaged with an air-seal promoting C-ring which also enhances feeding reliability. Compatibility-wise, this bucking is designed for unbridged VSR-10 and GBB pistol inner barrels.

The Decepticon makes use of a flat shield-shaped contact patch and is ideally paired with a Maple Leaf I-Key but also works with standard HOP-up arms/tensioners. When compared to its sister bucking, the Autobot, the Decepticon is made for maximum accuracy with a slight range sacrifice while the Autobot is focussed purely on long range. If you're all about accuracy, the Maple Leaf 2023 Decepticon HOP-up Bucking for VSR/GBB belongs in your build!

If you want to tighten your groupings and get maximum accuracy from your GBB or VSR setup, the Maple Leaf 2023 Decepticon HOP-up Bucking for VSR/GBB is the HOP-up rubber you need! Also known as the "Desepticons" bucking by Maple Leaf, this is the 2023 version with a refined shape and packaged with an air-seal promoting C-ring which also enhances feeding reliability. Compatibility-wise, this bucking is designed for unbridged VSR-10 and GBB pistol inner barrels.

The Decepticon makes use of a flat shield-shaped contact patch and is ideally paired with a Maple Leaf I-Key but also works with standard HOP-up arms/tensioners. When compared to its sister bucking, the Autobot, the Decepticon is made for maximum accuracy with a slight range sacrifice while the Autobot is focussed purely on long range. If you're all about accuracy, the Maple Leaf 2023 Decepticon HOP-up Bucking for VSR/GBB belongs in your build!

If you want to tighten your groupings and get maximum accuracy from your GBB or VSR setup, the Maple Leaf 2023 Decepticon HOP-up Bucking for VSR/GBB is the HOP-up rubber you need! Also known as the "Desepticons" bucking by Maple Leaf, this is the 2023 version with a refined shape and packaged with an air-seal promoting C-ring which also enhances feeding reliability. Compatibility-wise, this bucking is designed for unbridged VSR-10 and GBB pistol inner barrels.

The Decepticon makes use of a flat shield-shaped contact patch and is ideally paired with a Maple Leaf I-Key but also works with standard HOP-up arms/tensioners. When compared to its sister bucking, the Autobot, the Decepticon is made for maximum accuracy with a slight range sacrifice while the Autobot is focussed purely on long range. If you're all about accuracy, the Maple Leaf 2023 Decepticon HOP-up Bucking for VSR/GBB belongs in your build!

If you're building an AEG for maximum range, the Maple Leaf Monster HOP-up Bucking for AEG will be an asset to your objective. Designed with a diamond-shaped contact patch to increase surface contact with your BBs, the Monster is ideally used with heavy BBs (0.28g+) and provides increased HOP-up effect, especially when paired with an OMEGA or OHM HOP-up nub.

The Monster is available in a wide range of hardnesses, offering an option for any build objective, from CQB to DMR. Compatibility-wise, this is a standard AEG HOP-up rubber and should fit the vast majority of Airsoft AEGs on the market but may require expertise and tuning to fit. If you're getting out-ranged and want to go from prey to predator, the Maple Leaf Monster HOP-up bucking belongs in your build!

If you seek more accuracy and range from your AEG, a HOP-up upgrade is the first place to start! The PTS Syndicate MEC HOP-Up Bucking for AEGs; Twin Pack includes a black HOP-up rubber and a purple one, equipped with a bridge-style contact patch to minimise side-to-side deviation and maximise accuracy. 

The black HOP-up rubber is designed for 295-360 FPS builds, being made from 60-degree hardness rubber and the purple 70-degree rubber is intended for high FPS DMR builds hitting out at 360-460 FPS on a 0.2g BB. If you're the techy type with a build on the go at all times, the PTS MEC HOP-Up Bucking for AEGs; Twin Pack is a great set to have in the toolbox!

If your priority is extending range and you run a GBB pistol or VSR-10 platform sniper rifle, the Maple Leaf 2023 Autobot HOP-up Bucking is calling your name! Also known as the "Aotubot" by Maple Leaf, this bucking is designed for pure range, with a shield-shaped contact patch for maximum contact area with your BBs and an impressive HOP-up effect. Being the 2023 model, this set also includes an air-seal promoting C-ring which also helps improve feeding. Compatibility-wise, this bucking is designed for unbridged VSR-10 and GBB pistol inner barrels.

Naturally, the Autobot is designed for use with heavy BBs (0.28g+) and is ideally paired with a Maple Leaf I-Key but works fine with standard HOP-up arm/tensioner setups. When compared to its sister bucking, the Decepticon, the Autobot is made for pure range and the Decepticon is for tighter groupings at shorter ranges. If you need maximum range, you need the Maple Leaf 2023 Autobot HOP-up Bucking for VSR/GBB!

If your priority is extending range and you run a GBB pistol or VSR-10 platform sniper rifle, the Maple Leaf 2023 Autobot HOP-up Bucking is calling your name! Also known as the "Aotubot" by Maple Leaf, this bucking is designed for pure range, with a shield-shaped contact patch for maximum contact area with your BBs and an impressive HOP-up effect. Being the 2023 model, this set also includes an air-seal promoting C-ring which also helps improve feeding. Compatibility-wise, this bucking is designed for unbridged VSR-10 and GBB pistol inner barrels.

Naturally, the Autobot is designed for use with heavy BBs (0.28g+) and is ideally paired with a Maple Leaf I-Key but works fine with standard HOP-up arm/tensioner setups. When compared to its sister bucking, the Decepticon, the Autobot is made for pure range and the Decepticon is for tighter groupings at shorter ranges. If you need maximum range, you need the Maple Leaf 2023 Autobot HOP-up Bucking for VSR/GBB!

If your priority is extending range and you run a GBB pistol or VSR-10 platform sniper rifle, the Maple Leaf 2023 Autobot HOP-up Bucking is calling your name! Also known as the "Aotubot" by Maple Leaf, this bucking is designed for pure range, with a shield-shaped contact patch for maximum contact area with your BBs and an impressive HOP-up effect. Being the 2023 model, this set also includes an air-seal promoting C-ring which also helps improve feeding. Compatibility-wise, this bucking is designed for unbridged VSR-10 and GBB pistol inner barrels.

Naturally, the Autobot is designed for use with heavy BBs (0.28g+) and is ideally paired with a Maple Leaf I-Key but works fine with standard HOP-up arm/tensioner setups. When compared to its sister bucking, the Decepticon, the Autobot is made for pure range and the Decepticon is for tighter groupings at shorter ranges. If you need maximum range, you need the Maple Leaf 2023 Autobot HOP-up Bucking for VSR/GBB!

If you use heavy BBs and really want to send 'em, the Maple Leaf MR HOP Bucking for AEG belongs in your build! The MR HOP-up Bucking offers a wider and longer “R-HOP” style contact patch for increased HOP-up effect and extended range with heavy BBs. The MR HOP also uses a shield-shaped groove around the contact patch to allow it to stretch and add to the strong HOP-up effect along with an air seal improving C-ring which ensures the bucking is firmly fitted to the barrel and unable to slip or rotate.

MR stands for “Maximum Range”, a design based on home-brewed R-HOP buckings, intended to prioritise range over grouping size and is best used paired with a Maple Leaf OMEGA or OHM HOP-up nub. Compatibility-wise, the MR HOP is designed to fit most Airsoft AEGs but as always, a certain level of expertise and tuning will be required for installation. If you're committed to long-range leaning and want your primary performing at its best, the Maple Leaf MR HOP Bucking for AEG is essential!

An upgrade hop bucking for Tokyo Marui and other compatible products. Designed for the Tokyo Marui VSR-10 bolt action and blow back pistols in mind including the Hi-Capa 4.3, Hi-Capa 5.1, M1911A1, SIG P226, SOCOM MK23 and G26. 

If you're jealous of GBB users running the superb Crazy Jet inner barrel, the Maple Leaf Hot Shot HOP-Up Bucking for AEG will level the playing field! This HOP-up bucking is designed for use with standard AEG HOP-up units paired with Maple Leaf's GBB/VSR type Crazy Jet inner barrel, boasting a wedge-shaped concave contact patch with nubs on either side to encourage consistent BB chambering.

While the Hot Shot Bucking may work with other GBB/VSR type inner barrels, it is not compatible with standard AEG inner barrels. Multiple degrees of hardness are available, with an option for almost any BB weight and muzzle energy combination. If you want the performance benefits of the Crazy Jet barrel with your AEG, the Maple Leaf Hot Shot HOP-Up Bucking is essential!

If you're jealous of GBB users running the superb Crazy Jet inner barrel, the Maple Leaf Hot Shot HOP-Up Bucking for AEG will level the playing field! This HOP-up bucking is designed for use with standard AEG HOP-up units paired with Maple Leaf's GBB/VSR type Crazy Jet inner barrel, boasting a wedge-shaped concave contact patch with nubs on either side to encourage consistent BB chambering.

While the Hot Shot Bucking may work with other GBB/VSR type inner barrels, it is not compatible with standard AEG inner barrels. Multiple degrees of hardness are available, with an option for almost any BB weight and muzzle energy combination. If you want the performance benefits of the Crazy Jet barrel with your AEG, the Maple Leaf Hot Shot HOP-Up Bucking is essential!

If you're jealous of GBB users running the superb Crazy Jet inner barrel, the Maple Leaf Hot Shot HOP-Up Bucking for AEG will level the playing field! This HOP-up bucking is designed for use with standard AEG HOP-up units paired with Maple Leaf's GBB/VSR type Crazy Jet inner barrel, boasting a wedge-shaped concave contact patch with nubs on either side to encourage consistent BB chambering.

While the Hot Shot Bucking may work with other GBB/VSR type inner barrels, it is not compatible with standard AEG inner barrels. Multiple degrees of hardness are available, with an option for almost any BB weight and muzzle energy combination. If you want the performance benefits of the Crazy Jet barrel with your AEG, the Maple Leaf Hot Shot HOP-Up Bucking is essential!

The MEC HOP rubber/bucking is precision moulded and has a slightly narrower inner diameter at the entrance and extra coverage for the top of the barrel cut area for a vastly improved air seal. This HOP rubber provides two points of contact with the bb with equal pressure on either side, improving effective range and consistency.

Are you having HOP-up troubles with your M4 platforms? Delta Armory has you covered! This HOP-up chamber is a replacement part and comes with all the necessary pieces for installation, except for the HOP-up rubber and nub. The main chamber is made from a sturdy plastic polymer and is compatible with all M4 style AEGs which have V2 Gearboxes. It is an affordable solution to mend your platforms with damaged or old HOP-up chambers. 

The Delta Armory HOP-up chamber is an affordable replacement for M4/AR-15 AEGs, fix up those old primaries and get them shooting again with this low-price solution.

*Please note that the colour of this chamber may vary; occasionally coming black, as opposed to the imaged blue.

If you seek more accuracy and range from your AEG, the Prometheus Bridge HOP-up Tensioner for AEGs will help you achieve it! Supplied as a pack of two tensioners, these are the "Bridge" style design with a central groove designed to reduce side-to-side deviation, focussing on maximum accuracy and providing the smallest grouping possible. The contact surface provided by this HOP-up nub (another word for tensioner) is far larger than the standard, resulting in a stronger backspin effect and extended range with heavy-weight BBs. 

The two tensioners included in the set are of different colours; one purple and one black. The purple tensioner is made from softer rubber, designed for sub-350 FPS builds and the black one is slightly harder, ideal for 350 FPS and above, making it the perfect tensioner for an AEG DMR. Compatibility-wise, these tensioners should fit almost any Airsoft AEG HOP-up unit but as always is the case with internal upgrades, we only recommend these for experienced techs and those who know their way around AEG internals. If accuracy and range is your objective, the Prometheus Bridge HOP-up Tensioner for AEGs belongs in your build!