Yeah, the groupings are different without the bayonet extended.. I think it has something to do with barrel harmonics. I haven't tried shooting mine without it extended, I'm afraid the point will jam my fingers lol. It's also quite heavy (when I compare it to my sporter Enfield.)
I don't think I can link it but P&S has M38's in stock, I believe.. but the bayonet just has the coolness factor LOL. You will be the biggest bad ass in the forest
With shipping and tax I think mine came to $172.. the 91/30 would haven been around $200
Pretty much all my parts were forced matched