Complex sentence: As a standalone launcher, it was intended to be a special applications and support weapon, able to fire larger 25 mm grenade rounds which would generate 50 percent more, and heavier, fragments within a radius compared to the experimental 20 mm grenades.
Split into simpler sentences: As a standalone launcher, it was intended to be a special applications and support weapon. It was able to fire larger 25 mm grenade rounds, which would generate 50 percent more, and heavier, fragments compared to the experimental 20 mm grenades.