Machined from billet 7075-T6 Aluminum.

Features:

• Direct replacement of the Sig Sauer OEM polymer or AXG P320 grip modules. 
• M1913 Picatinny accessory rail (4 slots). /li>
• Flared magazine well.  
• Mag well accepts the Sig OEM magazine funnel
• Weight: Their grip module with wood panels weighs approx. 7.5 ounces. For comparison, The OEM M18 (polymer) grip modules from Sig weighs ~3.5 ounces. The extra ~4 ounces is hardly (if at all) noticeable while holstered, but while shooting the extra weight helps reduce felt recoil. The OEM P320 AXG grip module from Sig weighs ~7.7 ounces.  
• Seats Sig OEM 17rd magazines and 21 round magazines (15rd XCompact magazines are too short for this model). 
• Fits standard P320 holsters

Please NOTE:

• Fire Control Unit not included
• Magazine release assembly not included. Reuse your stock mag release assembly or purchase a new one: Sig OEM P320 Mag Release Assembly