Mark5

This is sort like going to the boatyard and asking if you should buy the big boat or the bigger boat. The most expensive part usually ends up being the recurring costs like putting fuel in the boat and slip fees. Get what you can afford or get what you want if you can afford it. Availability is the biggest limitation for a lot of buyers. Highly reccomend a 22lr conversion if you're looking to save some nickels. Limited quantity combined with limited access generally means value goes up over time either way you jump in the NFA world, but I wouldn't bank on it as an investment. The reality is that it is all a signature away from being worthless.

No longer - Looking for a m/45 sling in good to excellent condition. Like new, Swedish made, & leather w/ brass and/or copper hardware preferred but open to other options.

228 days for eform for suppressor

Sarco white barrel won't fit this firearm with barrel restrictor rings and semiauto trunnion... Try barrelxchangedotcom, they do custom barrels. Or maybe bwefirearmsdotcom - but the family is dealing with some recent significant losses and the community is smaller for it. Both were active uzitalkdotcom resources.