Aren't their covers the Tango Down version?
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Use a heat gun or hair dryer to slightly heat them up and they slide on or off like butter.
VFG!
Yes, I know BCM is coming out with one. Unity Tactical as well but nothing out yet. Currently have a nodded Magpul MVG on mine.
While not perfect, why don't you (OP) use a KeyMod QD attachment with a angular QD swivel and hook your HK hook to that?
http://www.midwayusa.com/product/720...-1-steel-matte
http://www.impactweaponscomponents.c...l-sling-mount/
Or use one of these
http://www.operationparts.com/KAC_Kn...el_p/21317.htm
Samson supposedly is coming out with one. Samson HK Keymod Hook