Pro-Arms Steel Safety for VFC / SIG AIR P320 M17 GBB Pistol Net-Weight-(g)_115 The H+ refers to the

The H+ refers to the inner barrel design as the external diameter of the inner barrel is thicker in comparison to a regular inner barrel which they suggest has far better shock resistance

If you still can't solve the leaking problem

Dimension: 102mm x 20mm x 11mm

Forward mounting design is low profile

The vest is composed of two panels - the front and the back ones connected by a light

Pro-Arms Steel Safety for VFC / SIG AIR P320 M17 GBB Pistol Net-Weight-(g)_115 The H+ refers to thePro Arms Steel Safety for VFC SIG AIR P320 M17 GBB Pistol Metal Construction Design For Upgrade the Originl Parts Suitable for VFC SIG AIR P320 M17 GBB Pistol