QUOTE (FuelDrop @ Oct 19 2012, 01:56 PM)

The Boys Anti-Tank Rifle. First created in the year 1936, it was abandoned in 1941 as impractical due to the devastating effect its truly staggering recoil had on the firer. Weighing in at 16.3 kg (36 lb), this gun is the original assault cannon.
I'd submit the
Mauser Tankgewehr M1918 as an earlier example.
But weren't anti-tank rifles like the Boys abandoned mostly because they couldn't keep up with the continuous increase in tank armor during WW2?
By the time of Shadowrun the Boys will have been out of production for over a century and I guess .55 Boys ammo would be nigh-impossible to find either, since AFAIK no other weapon used that caliber. Also the Boys wouldn't have the advantages of 2070s weapons concerning accessories like smartlinks, optics etc....
And the general concept has been revisited already IRL, see for example the successful Barrett line of rifles. If I somehow couldn't get a 2070s weapon I'd rather look for a well-conserved 2000s anti-materiel rifle, since I'd guess parts and ammo for those would be much more readily available.
All that's not to say that a Boys couldn't do the job, IF you manage to find one in working condition (which is not necessarily the case with museum pieces)
and ammo. But I'd consider it only if there's nothing more modern at all available. I suppose you could make it a plot point if the PCs suddenly and unforseeably need an AT rifle and happen to be near a WW2/arms museum or maybe if a PC is an arms collector/WW2 reenactor type. However I don't see it as "normal" equipment.