View Full Version : Question on JJ 20"
03-06-2009, 09:41 AM
I tried googling and searching the forum, but no luck so far.
I found the bore size, but can anyone tell me the outside diameter of the JJ 20" barrel at it's Widest point?
I was going to see if I can mod my BT-47 kit to fit around the JJ, but I don't know anyone around here that has one.
03-06-2009, 01:04 PM
I would strongly suggest not to get the 20 inch barrel.
20 Inch barrels will waste gas, and make the gun kick more. Also, it is a big hunk of metal at the end and it is not worth it.
I would suggest getting something from 12-16 inches in length
03-06-2009, 01:23 PM
I"m pretty sure the shroud will fit on it but I'm not 100%
03-06-2009, 01:34 PM
I know that 20" is a huge waste of gas. I am really concerned about it.
The only problem is that with that BT-47 shroud, you need a longer barrel to fit all the junk on. The stock barrel is like 16.5" or 17"(don't quite remember).
I'm just sorta hung on the JJ because I've had a couple of their ceramic barrels and they've worked really well for me.
Hmm.. well maybe I can take the 16" and just figure how to scrunch all the BT shroud stuff together? I don't know.
If you've got any ideas, let me know.
slim and shady
03-06-2009, 03:17 PM
you only lose about 20 shots a tank not a big deal at all. I know there are a few people on here who use them I just dont remember who
03-06-2009, 04:21 PM
Barrel o/d is 7/8" -
03-06-2009, 09:11 PM
03-09-2009, 09:03 PM
Can someone throw up an updated pic of a JJ 20" ceramic for me? I just want to get a feel for what it looks like on each end before I commit the 40 bucks to buying and praying that everything fits. Well if it's not too much to ask, maybe a pic of the 16" ceramic as well. I'm still a little on the fence.
I've only ever owned the 14" ceramic, myself, and wanted to know if the design between them is different.
slim and shady
03-09-2009, 09:25 PM
I beleive there the same.
03-09-2009, 09:26 PM
okay, if you're sure. I looked online and every site gives me the same generic pic for every barrel and size. I was getting frustrated.