The long awaited Silverback HTI (Hard Target Interdiction) is finally available for pre-order and is available in the 0.50 BMG flavour.......... would you want anything else?
 
The HTI is the bigger brother to ths SRS and has the following features;
720mm inner barrel in a 6.05mm id
The standard hop is adjusted the same as the standard SRS hop (via 2 x 1.5mm Allen keys),
SRS Fast Hop Compatible
71cc's of air volume in the piston
38rd magazine (and this is one chunky magazine!)
Weighing in at around 6kgs