Prometheus soft buckings are excellent for heavier ammunition at any field-legal velocity. I personally prefer them to Systema buckings, and have had far better luck with their performance.nelsonho396 said:Hey are prommy soft even good? I know systemas are good but hmmmm. You could also save money on the scope with a Ak scope rail but it will look off. Or custom make a dustcover rail like I did for free. Don`t forget a prommy m150 for a better spring.