I was somewhat impressed with the stock liberator, as for 15 bucks, it packed a decent punch. BUT, just as the famous Brit Jeremy Clarkson was in constant search of more power, so was I. And this spring delivered. Now, everytime I rack the Liberator, I feel a patriotic fervor rush through me. And when I pull the trigger, the loud ping and ball flying at 120 fps satiates my need for destruction. It's just stupendous. Although I wish it had flattened ends on both sides, it didn't bother me all that much. Easy install. Make sure to rack it all the way. Overall a fantastic purchase.