I guess that would be down to personal choice, you don't to have to remove it to put it away and Jeremy's claim that it didn't fit in the cupboard when the silencer was attached, turned out not to be true.
And after he was called on this false claim he compounded it with another lie- that it didn't fit in its case with the accessories attache. Nevill never bought a hard case for it like AP had purchased for his rifle. So there was no case. This was brought out in trial testimony discussing how no one ever saw a case, no one found a case and the gun dealer didn't sell Nevill any case.
After the case claim fell apart and he was told that the last known user said it was put away with the scope and moderator attached then Jeremy made up the claim he and Nevill used it repeatedly the week before the murders and claimed during this period of time Nevill sometimes took the scope and moderator off before putting it away and other times left them on. Prior to police confronting him about being the last known user, Jeremy claimed he had not used it for more than a week before the murders thus his own testimony helped establish AP was the last known user. He changed his story and did so for a very transparent reason. Nevill was not known to remove the scope and had no reason to do so thus the claim he repeatedly did so is not credible. Similarly there was no reason to remove the moderator. Yes it screws on and off but you don't waste time screwing something on and removing without a reason. The only reason to remove it would be to clean the gun barrel which probably was never cleaned since it was purchased given the buildup. Only about 150 rounds had been fired in the weapon prior to the murders. If one takes into account the target shooting Jeremy periodically did with it in the barn to get accustomed to it and those fired by AP for target shooting that means few if any rounds were fired in any other context.
Jeremy's suggestion it was used constantly holds no water which explains the near pristine condition AP found the rifle in.
I have never seen any Jeremy supporters put forth anything to explain innocently why he lied about these things or to deal with the evidence that proves he lied about leaving the gun out at all. He staged the bullets in the kitchen after the murders. The only way for those bullets ot have been placed there before the murders as he claimed would be if the killer decided to use 20 bullets from that supply and then decided to go get 5 more from the closet rather than continuing to use that supply. Such makes no sense though.