b2k3 or k4?

[Chompy]

What's the difference between a b2k3 and 2k4?

Oh, and does 2003 take cocker threaded barrels also? Thanks.

[ShootPaint]

Mid to late 03 take cockers barrels and all 04's take cockers barrels.

The major difference between the 03 and the 04 is the fade anodizing on the 04. This is about the only difference.

[lotus_esprit5]

a few others, but all pretty minor.

B2K3:
-dust anno
-ICD threads (except later ones)
-horizontal on/off and PDS switches
-some had 2-piece bolt pin with plastic top, which broke (mine did)
-big gauge on some (mine has a massive 0-700psi Ashcroft)
-stock high-rise except on later ones
B2K4:
-gloss anno
-cocker threads
-slanted on/off and PDS switches
-all metal 1-piece bolt pin
-smaller gauge
-stock low-rise

[Pbkid39]

Also, I believe the very early ones came with the older style double finger groove grip frame.

[Chompy]

So there aren't really any differences in performance?

[nirvana1234]

nope

[ShootPaint]

There was going to be a new noid installed in the B2K4 to give it higher cycling speeds but it had to much flow that caused the marker to become a gas hog so it was dropped just before production started.