I recently purchased and just received a CCA UTG pistol grip from fellow member Ben. He had performed neccessary modifications to the grip so that it would fit the ER model of the 556. Ben is a real pro and you'd never know that this grip was not originally manufactured to fit the 556! Very ingenious - materials used were excellent and the end product is as strong as any design could be. Too bad some of the 'aftermarket' companies don't take a cue from Ben! As well, Ben was easy to 'work with on the purchase. I feel fortunate to have been able to deal with him on a real improvement for my 556!
Thanks Ben.
Correction - this was a CCA UPG grip
Thanks Ben.
Correction - this was a CCA UPG grip