Im looking around at uppers and as a hunter first and foremost, I want the ability to slide one in the chamber quietly. That steered me away from Bartz, a local company with great products. Well I just noticed mega has uppers that appear to have a slot along the ejection port. Does somebody make a bolt with a "handle" so you dont need the rear charge handle? Would this allow you to feed a round in quietly without a forward assist?
http://www.megaarms.com/ar-15/upper-receivers/billet-uppers/sbu-billet-upper-with-ch-slot/
While we are talking about uppers, are they all compatible with the 450b? Is the bolt sizing mil-spec or are do I have to pick and choose the upper based on a certain companies bolt? Sorry if my nomenclature is off, Im new to AR's. My past gun experience has been load it and shoot it, clean and repeat. Never got into ordering individual parts and needing to know their name.