idunno man, this is getting bizzare...
http://www.thefirearmblog.com/blog/2009/11/30/fbi-purchases-20mm-rifles-with-suppressors/
FBI Purchases 20mm Rifles with suppressors
Wyn Boniface was quick off the mark in spotting a pre-solicitation request from the Federal Bureau of Investigation for the purchase of two Anzio Ironworks 20mm magazine fed rifles (cannons) with suppressors.
Anzio's rifles are chambered for the 20x102mm Vulcan cartridge. When loaded with a non-explosize 1543 grain projectile the round can achieve 3395 fps, generating 39500 ft/lbs of muzzle energy (compared to 14,000 ft/lbs of the .50 BMG).
At longer ranges the relatively poor ballistic coefficient of these large rounds will cause a significant decrease in energy but when used with high explosive ammunition this is not a problem as the on-target kinetic energy is less important than the chemical energy contained in the warhead.
It would be at the very least interesting to find out what these rifles will be used for. With just two rifles being purchased they might be destined to just training and / or evaluating the usefulness of this class of weapon.
I looked this up after thumbing through a copy of th mall ninja rag Tactical Weapons. if anyone is interested I can transcribe excerpts.
http://www.thefirearmblog.com/blog/2009/11/30/fbi-purchases-20mm-rifles-with-suppressors/

FBI Purchases 20mm Rifles with suppressors
Wyn Boniface was quick off the mark in spotting a pre-solicitation request from the Federal Bureau of Investigation for the purchase of two Anzio Ironworks 20mm magazine fed rifles (cannons) with suppressors.
The solicitation number is 10-Q-LDQ002768.
Anzio's rifles are chambered for the 20x102mm Vulcan cartridge. When loaded with a non-explosize 1543 grain projectile the round can achieve 3395 fps, generating 39500 ft/lbs of muzzle energy (compared to 14,000 ft/lbs of the .50 BMG).
At longer ranges the relatively poor ballistic coefficient of these large rounds will cause a significant decrease in energy but when used with high explosive ammunition this is not a problem as the on-target kinetic energy is less important than the chemical energy contained in the warhead.
It would be at the very least interesting to find out what these rifles will be used for. With just two rifles being purchased they might be destined to just training and / or evaluating the usefulness of this class of weapon.
I looked this up after thumbing through a copy of th mall ninja rag Tactical Weapons. if anyone is interested I can transcribe excerpts.