Shipping & Delivery

 Q: What are your shipping costs? 

 UK SHIPPING (24hrs Dispatch)

Orders up to £35.00 UK Recorded Signed For™ £4.95
Orders between £35.01 - £99.99 UK Recorded Signed For™ £6.99
Orders £100.00+ UK Recorded Signed For™ £FREE
Restricted products To local RFD £35.00



Orders up to £35.00 Courier £6.95
Orders £35.01+ Courier £9.99



Flat Rate Courier £35.00


Q: How long does it take for you to process the order?

We have a very large stock holding and only advertise items that are currently 'in stock', therefore we are able to ship most orders within one working day. 

 Q: How will the Package be marked?

The shipments arrive in safe, secure and discreet packaging.

The company details are marked as “Emmett & Stone”

 Q: Can you ship firearms?

We can only ship restricted products to your local Registered Firearms Dealer and you can collect from them.  The appropriate shipping rate must be paid before shipment can occur.  Ensure your contact details are correct so we can make the best arrangements for you.

 Q: Do you ship internationally?

Yes!  Flat rate £35.  You may be subject to import duties and taxes which are levied once a shipment reaches your country.  Any such additional charges for customs clearance must be borne by you.  You should note that customs policies vary widely from country to country.  We advise you to contact your local customs office for further information if you are in any way unsure of local duties or liabilities.  Cross border shipments are subject to opening and inspection by customers authorities which means some packages may be opened and re-sealed.


Returns & Refunds


In the unlikely event that you are dissatisfied with your purchase, please follow the simple returns procedure. Contact us within 14 days, giving details of the product and when purchased. All items must be unused and in a fit condition for resale. Always keep your invoice as this is your proof of our guarantee for those items which have a warranty.

If you return an item you are not pleased with, or which is faulty, the item must be returned to us in its original packaging and original condition (unless damaged in transit).  You must provide your receipt.


Genuinely faulty goods will be credited in full for the item and including return P&P. Unless you agree otherwise the refund will be by the same payment method. No fees. We may make a deduction if the goods have lost value because you have handled them more than was necessary to establish their nature, characteristics and functioning.

Returns on full price items cannot be considered after 28 days from date of purchase. You will be credited for the purchase price excluding any carriage costs for any item which is not faulty. This does not affect your statutory rights.

Returns on sale items must be within 14 days of purchase and must be accompanied by your receipt.  We cannot refund orders without a valid receipt.

If returning an unwanted item, the parcel is your responsibility. You are also responsible for the postage for the return parcel. May we strongly recommend you send it recorded post or by courier.

If you are returning an item as a result of a mistake by Emmett and Stone Country Sports Ltd or for a faulty item, we will pay for the cost of postage for the returned item(s). All returns must be sent to:

Emmett and Stone Country Sports Ltd
Wilton Farm
Little Marlow

HK, Walther, Colt, 22LR Barrel Adaptor – 1/2 X 20 UNF

SKU: 001873001001

Features of HK, Walther, Colt, 22LR Barrel Adaptor - 1/2 X 20 UNF

The finest thread adaptor available that converts the factory thread pitch to 1/2 X20 UNF. Each adapter comes with a built-in wrench slot. This custom adapter allows you to simply unscrew the stock flash hider and quickly and effortlessly convert the barrel to 1/2X20 threads. This adaptor can be mounted permanently & provides the perfect index without any loss or deviation of zero. 

This is suitable for the Umarex HK 416D & Colt M4 & MP5-A5 .22 style rifles. Each adaptor comes with a fitted thread protector for protecting the exposed 1/2 X 20 thread when a flash hider, comp, or suppressor is not in use. This is a must-have for those that want to use a sound suppressor or other muzzle device. 

Fits all of the following:

  • HK 416 .22 LR Rifles & Pistols
  • Colt M4 .22 LR Rifles
  • HK MP5 .22 LR Rifles
  • Other Walther/HK/Umarex applications
  • Air Rifle 
  • Airsoft compatible

The HK, Walther, Colt, 22LR Barrel Adaptor is a high-quality accessory that is made of durable materials. It is designed to be used with firearms that have a 22LR barrel.


The adaptor has a thread size of 1/2 X 20 UNF, making it easy to install on your firearm. It allows you to use accessories that are designed for larger calibers with your 22LR firearm.


This adaptor is compatible with a wide range of firearms, including HK, Walther, and Colt. It is the perfect accessory for anyone who wants to expand the functionality of their 22LR firearm.


The HK, Walther, Colt, 22LR Barrel Adaptor is easy to install, and it comes with all the necessary hardware. Simply screw it onto your firearm's barrel, and you're good to go!

Buy now

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