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Home / Shop / Parts & Upgrades / AEG Internals / Springs / Waldo Dynamics VFC AR/MCX Efficiency Hammer Spring
The One Spring You Need For Efficiency All Year-Round
Boost your VFC GBBRs performance year-round with the Waldo Dynamics Efficiency Hammer Spring, precision-engineered for the VFC AR and MCX GBBR platforms. Designed at 75% strength, this hammer spring delivers improved gas efficiency over the stock component but can still be used all year around.
That’s right; despite this being an overall weaker hammer spring you can still use this in peak summer on your usual green gasses. We performed some extensive testing in the last few months in climates all over the world and found no issues with it’s capabilities. This is just a very simple upgrade over the stock spring that can be installed within 3 minutes (video guide here).
Finished in a distinctive blue coating, the finish not only reduces friction (giving you a butter smooth shooting experience) but it also helps you tell it apart from other springs you may have.
This product is compatible with;
– All VFC AR based GBBRs (KS1, BCM, URGI, XM series etc)
– VFC 416 GBBR
– APFG MCX GBBR
Please note that installing this spring, whilst it can be quick and relatively easy, does require knowledge for installation. This video here can guide you
We aim to SHIP your purchase within 2 business days, usually less. If this is not possible, we will contact you as soon as we can. We cannot be held responsible for delays due to the Courier Service or Post Office Royal Mail. Please allow up to 4 days for delivery, depending on your chosen shipping option.
UK Delivery: For details of our shipping charges please view our Shipping Policy.
Please Note: We currently only ship within the UK, we do not ship outside the UK or overseas.
As the delivery is provided via a courier service it is important that you ensure there will be someone available at the delivery location to sign for the parcel. No refund of the delivery cost will be made for failed deliveries where there has been no-one available to accept the parcel.
If you wish to return any items, please contact us either via email (info@urbanairsoftuk.com) or on the phone (01924 899 109)
Returns address:
Fear Masters Entertainment Ltd
t/a Urban Airsoft Store
Exchange Buildings
Exchange Street
Normanton
West Yorkshire
WF6 2AA
* Please note this is our Head Office and Shop.
We’d love to hear from you – whether you need help sourcing that specific product, or want some advice on the best products to suit your requirements, our expert team are on hand to help.
Urban Airsoft Mega Store, Exchange Buildings, Exchange Street, Normanton WF6 2AA
Here at Urban Airsoft Mega Store, We guarantee to try and match any like-for-like price on any product shown on our online store, subject to T&C's.
Our on site tech guy The Airsoft Doctor offers custom upgrades, professional repair and servicing, two tone and camo paint jobs.
We aim to SHIP your purchase within 2 business days, usually less. If this is not possible, we will contact you as soon as we can.
Our professional two tone service usually takes up to 3 working days, the spray will cover 51% of the replica.




