Very similar in size to the 4009 and 4011. The ERGO 2 Grip is slightly more rounded in the back.
Design allows installation on both .223 and .308 AR-15/AR-10 type receivers.
A2 sized inner cavity compatible with many accessories available on the market.
Ergonomically correct finger grooves
Integrated rear upper extension supports the web of your hand.
Over molded SUREGRIP™ material provides non-slip grip
Virtually impervious to oils and solvents
Comes with The Gapper™