Does anyone know where to find one of these Parabellum Ado charging handles? I am building a new AR and I have the Raptor but for some reason it is very tight in my reciever. So I'm looking for a different one. This one I came across while looking but can't find a place to purchase.

If you don't know but do know why my Raptor is so tight maybe just an answer to my problem would be cool too. I am using a HERA upper with this.

http://dunamisf.ipower.com/store/page52.html

http://www.outdoorgearbarn.com/p-38601-par-arm-ambi-chrg-hndl-dual-over-blk.aspx

http://www.captaintactical.com/c-269-charging-handles-latches.aspx