What ??? Please explain how your opinions on Walker are directly connected with the total lack of scientific ballistic forensic tests of the rifle ??? Again, you are making more allegations and hypotheticals to simply confuse the facts! This time it's your opinion on what Walker might have done, and your opinion on what Walker might have intended to do. The fact is, Walker has always stated that no shot was ever fired from that rifle because the rifle was jammed, due to a faulty operation of the rifle by Ryan at Lange's prison guard post. Ryan had cocked the rifle with the safety catch on, which  caused the rifle to jam. A ballistic expert testified this fact at trial and there was no contest. 
The rifle was intentionally kept by Ryan to prove his innocence - to prove the rifle had not fired a shot. 
Stick to the facts !!!