I ordered this upgrade spring for my liberator. The spring was not the right size, wasn't able to lock the prime bar in place. I am going to try a few different ways to fix the spring so I don't have to use the stock spring.
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.
Dartzone Liberator Spring (120 FPS)
The spring gives the proper power the Liberator needs. It is unfortunate the coil is not flattened at the cut end but as long as no damage comes of it, I will not complain any further than an aesthetic concern. Even if I cannot see it, I know what it looks like, so just being nitpicky.
This simple little drop in spring upgrade takes the Liberator from being a very cool looking but not all that competitive blaster to an absolute powerhouse of a ball blaster! The only downside is that the prime weight is VERY heavy and will result in occasional double feeds if you don't prime it all the way on the first try, either that or my arms are just kinda weak. Either way, it's well worth the $5 and I'll be keeping it handy for close encounters.