How about that? An bottle opener integrated into the KeyMod rail system by G&P as shown in this video from Evike.com... "The G&P 'Bottle Opener' rail offers all the the same form and function as the traditional MOTS rails but with an integrated bottle opener cut at the mouth of the rail gives the operator the ability to open a frosty beverage anywhere, even when a traditional bottle opener isn't available.

Features:

• Precision CNC machined aluminum construction
• Anodized finish
• One piece free float design
• Keymod spec modular system
• Integrated bottle opener cut at the front of rail, perfect for poppin' bottles on the field
• Incredibly lightweight design
• Full length 20mm top rail w/ 20mm forward bottom rails
• Integrated QD sling points
• Barrel nut included"