First off-nice forum you guys have made here! Bought a Slb2k years ago and seem to remember them advertising that you could change the caliber with a top end swap like an AR. Does any one know of any available top ends for these rifles? BTW mine shoots great and Ive always wanted to get "extra top ends" for it. Were these guns finally discontinued? Good guns but damn ugly. I worked at a gun shop and mine was a late night impulse buy because after owning other HK's I knew that it had to be great gun. I remember my boss asking me why on earth I would want such an "ugly [email protected]%!ing gun" Glad I bought it though because it shoots great. Any othe Slb lovers on here or are they the red headed stepchild that they appear to be? Thanks Guys!