the drum mag one the pump is not a problem
That kit is the old sidwinder drumm kit from Knoxx stocks, from before knoxx sold to blackhawk and moved to china
Knoxx spent 7yrs trying to get that items to work 100% then gave up
I like the bolt gun with ar15 mag , can u say 6.8 with a 10rd mag!!
great idea just a shame its from mossberg