Its doable to mod it to fit a sporter. I got a blackbeard x for play a bit with the old ARs but a friend wanted to try it in his sporter. Took a drill to the back of the mantis under the charging handle mold and with a little bit of fitment was able to get it to fit into the sporter up and it worked shockingly well. He bought mine that we modded and I bought a new one. Great little device