Original sentence: He is the Swedish designer who also designed many earlier Husqvarna (in Sweden), Swedish Interdynamics AB (in Sweden), Intratec, and Grendel brand firearms.This eliminates the major drawbacks of Bull-pup rifles, which may not be readily usable by left-handed shooters and cannot be fired from the hip
Edited sentence: Furthermore, shooters which have ever experienced a catastrophic failure on a firearm are generally seriously concerned about such an event to happen on a Bullpup rifle (where the chamber is very close to the user's face), and the fact that the RFB rifle chambers the powerful 7.62×51 NATO cartridge might pose higher risks of injury for the user.He is the innovative Swedish designer who also designed many earlier Husqvarna (in Sweden), Swedish Interdynamics AB (in Sweden), Intratec, and Grendel brand firearms.NOTE the Correct Spelling of George's last name is "Kellgren" with 2 l's, not 1.This eliminates the major drawbacks of Bull-pup rifles, which are generally not readily usable (if at all) by left-handed shooters and cannot be fired from the hip; however some shooters think that the forward-ejection Bullpup rifles like the RFB (and the Belgian FN F2000) create other concerns, such as not giving direct access to the chamber and thus making very difficult the clearing of the gun (taking out the chambered cartridge)