If you're uneasy about drilling into your factory gun stock, this 50mm bottle clamp will easily attach to your 50mm carbon fiber or aluminum bottles. It has rubber pads on the inside to prevent any marring to your bottle. 

This clamp has picatinny rails at the bottom for you to connect your preferred picatinny accessories.

Great fit for the Umarex Gauntlet 30. 

Features:

• 6061 T6 aluminum
• Matte black anodize