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Hadron Airsoft Designs UK

Hadron Airsoft Designs is an innovative small-scale British manufacturer renowned for their top-quality MK23 gas pistol enhancement parts. We stock a range of parts, including plates, rails and hop units, to help modify your existing MK23 pistol into a highly customised masterpiece. TAC-41 owners can also upgrade with the Hadron x Sniper Mechanics Tac Nub V2. Read More>>
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Frequently Asked Questions

Need To know more?

What is Hadron's TDC conversion?

TDC (top down conversion) is a hop-up modification for the MK23 with interchangeable pressure plates in single, twin and triple screw versions. Paired with the H-Plate, it's a popular MK23 upgrade.

Does Hadron make parts for other pistols?

Yes, including TDC outer barrel assemblies for G-series pistols (TM and WE) and the TM FNX, and a TDC conversion kit for the TM LCP2.

Do you stock Hadron AAP-01 parts?

Yes: the Loki AAP-01 hop unit in red, green, black and gold, the Loki Stealth TDC and a short stroke buffer with a 300% nozzle spring.

Which guns are Hadron parts for?

Mainly the MK23, AAP-01, G-series and TAC-41. Check each listing for compatibility.

TDC (Top Down Conversion) Hop-Up Modification

Hadron gained popularity due to the success of the MK23 TDC system with interchangeable pressure plates that have either a single screw, twin screw and now the triple screw to choose from.

The TDC mod is easy to install and can hugely enhance the performance of your MK23 pistol. Paired with the H-Plate, this is the ultimate combination for any user.

Hadron have recently released the TDC outer barrel modification for the Glock G17 airsoft pistol, offering a lightweight, fixed position, upgraded outer barrel that reduces the inconsistencies of every BB pellet due to the stabilised hop unit.

SLS Printed Airsoft Products

Due to the high-quality manufacturing methods, Hadron products are all hard-wearing, lightweight, and durable.

Along with the TDC mods and H-Plates, they produce a special top rail for the MK23 pistol, which is held on with whatever red dot sight, scope or 20mm rail accessory you decide to attach to it.

Can't find what you're looking for? Not a problem; get in touch with us, and we'll see if we can order it for you.

What's in the Hadron Range

  • MK23 – the M-TDC plate, M-TDC RIS rail, TDC chassis, CNC H-Plate V2, H-Arm V2, Saviour Arm and Hot Lips upgraded feed lips.
  • AAP-01 – Loki hop units in several colours, the Loki Stealth TDC, the Loki Quark quick hop TDC adjustment and a short stroke buffer with a 300% nozzle spring.
  • Other pistols – TDC outer barrel assemblies for G-series GBBs (TM and WE), a TDC outer barrel kit for the Tokyo Marui FNX, and TDC conversion kits for the TM LCP2 and Bodyguard 380.
  • Tac-41 – the Medusa hop adjustment, a Tac Nub and the Pegasus hop chamber base kit.

Why Choose a TDC Hop-Up?

On many gas pistols, adjusting the hop-up means stripping the slide. A top-down conversion moves the adjustment to the outside of the gun, so you can fine-tune your hop between games without taking anything apart. This is especially useful if you switch BB weights or play at sites with different conditions.

Fitting Advice

Hadron parts are designed for specific models, so check the product description against your pistol's make and version before buying. Take your time when stripping a pistol for the first time, keep track of small springs and pins, and test the gun with a chrono after fitting. Find more parts in our MK23 pistol upgrades, AAP-01 parts and TAC-41 upgrade parts collections.
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