SuperBlob

Hi! Forgive me if this is a noobish question or anything like that; I'm new to Nerf modding, and I couldn't find an answer to it anywhere on this forum or elsewhere. That might just because it's obvious, but none of my friends who've modded have modded Mavericks, so I don't have any examples to go off of either.

I recently decided to attempt to mod my Nerf guns, and, after watching some videos online, decided that the Maverick AR and half-barrel mods looked easy enough to do. The video I followed, as I later discovered, didn't go very far with removing the ARs; it didn't cut out the dart-holding rods from the caps or anything, it just removed the first air restrictors and the springs. The mod also involved taking one of the AR springs and putting it on one of the end of the barrel, presumably to help it snap out quicker. In any case, both mods work fine, but when I try to fire the gun empty (even just that chamber) or cock it twice, it makes a rather loud cracking sound (I can post a video demonstrating if need be). Is this a normal side-effect of removing the ARs, a result of adding the AR spring to the barrel, or did I just do something wrong? And if I did do something wrong, how can I fix it?