Q: What makes the STI “TruBor” barrel and compensator superior to a “screw on”, or anybody else’s compensator system?
A: While independent tests conducted in Switzerland have proven that the S-2 and S-1 (STI’s discontinued screw on compensators) are the equal or superior of every other compensator on the market, the TruBor has several characteristics that make it yet more superior. This unit, which comes in a .355″ bore diameter only, is fabricated from a single piece of 416R (rifle grade) stainless steel and, therefore, has no need of threads nor the area that the threads would occupy. This allows it to be .400″ shorter and approximately 1½ oz. lighter. Since there are NO threads, it is legal in California, cannot come loose, is a great deal easier for a gunsmith to fit and “clock in”, and is inherently more accurate. To explain further, since the compensator is both bored and rifled at the same time and with the same tooling as the barrel, there can be no misalignment. Because the alignment is perfect, the clearance bore in the compensator can be tighter, and therefore more uniform than is possible in a threaded compensator. With gas pressures equal on all side of the bullet, enhanced accuracy is a given.