With some effort, practically any “full power” regulated PCP can be downtuned for target work. The question is mainly whether you want to do that…some mix of lowering the regulator setpoint, reducing the hammer strike (weaker hammer spring and/or lighter hammer), and/or reducing the porting. Or instead go with something more specifically designed for the role like the aforementioned T200.
If you’re leaning toward something in the class of the Gauntlet or the Avenger, I assume you are aware that either one will be rough around the edges in stock form. Otherwise they generally seem to have similar potential in terms of accuracy, energy, shot count, etc. The roughness comment isn’t a knock, just a recognition that something with this many features at a budget price point won’t have anything approaching high class workmanship or precise fit and finish. If you want those things, you’ll have to do it yourself. And you should want it because the end result is worth it.
As I see it, these two platforms have so many similarities that the key differences can be delineated with just a few points:
Avenger
+ Externally adjustable regulator (or can be a negative if you are careless and damage the seat)
+ Lighter weight; sleeker appearance
- Regulator has a spotty record (both creep and nonlinearity)
- Loud for a shrouded airgun; needs baffles or an external LDC
- High fill pressure…though of course you don’t have to fill it all the way to the max
Gauntlet
+ Simple construction; easy to work on
+ Time-proven design based on the QB78 / QB79
- Like holding a 4 foot long 2x6. Recently pressure treated and still wet.