• A2 sized inner cavity compatible with many accessories available on the market

• Unique design allows installation on both .556 and .308 AR/M4 lower receivers without a need for spacer inserts.
• Ergonomically correct finger grooves

• Integrated rear upper extension supports the web of your hand
• Superior SUREGRIP™ texture improves weapon control, even while wearing gloves
• Virtually impervious to oils and solvents