JSB King heavy MKI VS MKII boxed wrong?

[mikes383]

Hi! Recently ordered a tin of .25 300ct MKI and 4 tins of 150ct MKII to try. Upon closer inspection, It seems my MKI's are possibly boxed wrong? I see absolutely no difference in size or shape between the two even when measuring with a dial caliper including, height, skirt diameter and cup depth. From the online searching, there should be a visible difference unless something has changed recently? Thanks in advance!! 

 

[Monkeydad1969]

Pics and where did you get them from?

 

[mikes383]

I got them from Pyramid Air. Two separate orders a couple days apart. MkI on left and MkII on right(supposedly). 

 

[Monkeydad1969]

Did you contact Pyramyd Air yet?

 

[mikes383]

I've sent an email, so shall see what they say. In the mean time, how can I tell what I have? Searching online I get different opinions about size and shape etc. Just would like to confirm. 

 

[dannya1a]

the MK2's are supposed to have a skirt diameter of 6.5mm. the mk1's are bigger I think. that is about the only difference I can recall between them.

 

[nervoustrig]

As Danny says, the skirts on the MKI are larger. 


Similar discussion from October
https://www.airgunnation.com/topic/is-jsb-heavy-mki-now-jsbheavy-mkii/

 

[Enkey]

Hi

I think they are MKII, the MKI have a very thin skirt

MKI

MKII

Regards

Enkey 

 

[steve-l]

How are they marked on the tins?

 

[mikes383]

One of them says Jsb heavy and the other one says MKII cz. I can get pictures of the lids later when I’m home if it helps. Pyramid air claims they are supposed to be identical with just a slightly larger skirt diameter but I measure these things exactly the same other than manufacturing tolerances. 

 

[caesar]

Both look like MK-II to me as well could be wrong. That IS strange.

 

[Drumsnguns]

I had the same problem and did a post with pictures. Boxes marked MKI were actually MKII. I got them at Pyramyd and they made good and gave a refund. I waited until the got a new shipment I and tried again. This time all was good. Search my post if interested. 

https://www.airgunnation.com/topic/is-jsb-heavy-mki-now-jsbheavy-mkii/

 

[Airgun-hobbyist]

Choot 'em! Choot 'em! And order from another company that does not have the same stock if you really want to try the thinner skirt in your barrel.