Ergo Grip ERGO 2 Grip AR

• Design allows installation on both .223 and .308 AR-15 type lower 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™

Very similar in size to the 4009 and 4011. The 4010 is slightly more rounded in the back. The shooter may or may not notice this size difference.