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Airsoft hop-up devices apply a backspin to the pellet so that the pressure force acts on the pellet opposite to the direction that gravity is pulling it. This causes the pellet to fall less over a given distance than it would without the spin applied to it.

In airsoft guns this is often implemented as a rubber piece at the rear of the barrel that is thicker at the top of the barrel than the bottom. As the pellet moves past this piece it tends to roll, inducing a backspin. This is most often adjustable so that the effect can be tuned to suit the weight or speed of the pellet and each player's preference."

Product Description

Item Name: JJ Airsoft Masada CNC Hop Up Chamber

Model: JA-3620

Color: Blue

Brand Name: JJ Airsoft

Material: Aluminum

Net Weight: 12 g

Gross Weight: 19 g

Product Features

Make of aircraft grade 6061-T6 aluminum

All CNC machined

Fit for A&K, CYBERGUN，PTS MASADA

Include all small parts (or you can use original)

JA-3620

Product Description

Item Name: JJ Airsoft G36 Hop Up Unit Set Metal

Model: JA-3614

Color: Blue

Brand Name: JJ Airsoft

Material: Aluminum

Net Weight: 0.05kg

Gross Weight: 0.06kg

JA-3614

Product Description

Item Name: JJ Airsoft AUG Hop Up Unit Set (Metal)

Model: JA-3607

Original Version:

Color: Blue

Brand Name: JJ Airsoft

Material: Aluminum

Net Weight: 0.020kg

Gross Weight: 0.030kg

JA-3607

Shipping:

·We Ship to US, Canada, Euro, Oceania, part of South America and part of Asia.

·Items will get Q.C. passed before packing and be shipped within 2 workdays on payment received.

·We send items to worldwide for free by registered Hong Kong Post Air Mail with tracking number. And free shipping from China to the USA by ePacket with tracking number. In addition, we use DHL(DHL Hong Kong) for worldwide shipping with extra fee. Also we provide other shipping methods, such as UPS, FedEx, TNT, EMS and etc. For more information about the method and cost, please notify us by e-mail.

·Delivery time depends on destination and other factors, it may take up to 20 workdays.

·We will pack the products well with normal appearance, which is easy for custom clearance. If you have additional request upon the packing please inform us in advance.

·If possible, please provide your telephone number only for the purpose of your local post office needs, in case that you are absent or not able to pick up the items at your location in time, the post office may call you for reminder (Mostly, mail carrier will only put a notice).

·We will keep highly confidential for our customers' personal information.

Payment:

·We accept PayPal.

·We will ship to your Ebay&Paypal address. Please make sure your address is correct before you pay.

Warranty and Guarantee:

· We provide 12 months of warranty for all our items.

· If you are not satisfied with the item, please return it within 14 days upon receipt for replacement or refund. In this case, you may need to bear the expense of returning the item.

· If the item is defective except man-made mistakes, please contact us within 14 days upon receipt. We will send you a brand new one without extra charge after we receive the defective one.

· Before replacement or refund, please contact us in advance to confirm the detail.

Other Policies:

· We are not responsible for any custom duty or import tax.

· We will leave POSITIVE FEEDBACK after receiving the payment. Please contact us if you are not satisfied with the products.

· All e-mails will be answered within 1 workday. If you do not receive our reply, please kindly send your email again in case we encounter some network problems.