Hey there
I think there's a lot of metal trigger guards out there, but most of the stock ones are pot metal. After looking at pictures, the Barrett seems like a gamble as it doesn't really look like a VSR one.
I'd look at these 3, they're cheaper than PDI and will definitely fit your stuff.
www.evike.com
www.evike.com
www.evike.com
I think there's a lot of metal trigger guards out there, but most of the stock ones are pot metal. After looking at pictures, the Barrett seems like a gamble as it doesn't really look like a VSR one.
I'd look at these 3, they're cheaper than PDI and will definitely fit your stuff.

Angel Custom VSR-10 CNC Aluminum Reinforced M5 Trigger Guard
Shop ... , Accessories & Parts, External Parts, Shop by Other Gun Models, Sniper Rifle Parts, Trigger Guard / Parts

Angel Custom VSR-10 CNC Aluminum Reinforced R700 Trigger Guard
Shop ... , Accessories & Parts, External Parts, Shop by Other Gun Models, Sniper Rifle Parts, Trigger Guard / Parts

Laylax Custom Ergonomic PSS VSR-10 Trigger Guard for Tokyo Marui VSR-10 Airsoft Sniper Rifles
Shop A simple yet elegant custom trigger guard that allows for greater grip. Easily grip the front of the trigger guard as a hand stop or for an extra point of contact.... , Accessories & Parts, External Parts, Shop by Other Gun Models, Sniper Rifle Parts, Trigger Guard / Parts