[quote=@PrivateVentures]
[@Gunther] you're all set. Make that a DSG-4, scale it up to 8mm Magnum, and you're good to go. 
.308s are alright in today's world, but you need a little more force in this one to be effective. I figure 8mm Mag would be more than enough to crack a shield open.
[/quote]
Would you be OK with a model of weapon that chambers the [url=https://en.wikipedia.org/wiki/.338_Lapua_Magnum].338 Lapua Magnum[/url]? Equivalent to 8.6mm Magnum Cartridge?
DSG-4A2 or something?

Personally, I prefer the .338 Lapua round over the 7.62mm (.308) or .50 cal round. The .50 is too damn expensive and overkill. The 7.62mm is effective out to 800m - 1000 meters, but .338 can reach out to 1500 meters which is not too shabby. You rarely get 1 mile shots anyway.