IIRC PT&G makes 1-pc bolts for Rems, BUT, having had Rems blueprinted (and one had a bolt handle fail - as in fall off), and also having customs like Stiller and Borden, I personally feel a custom action is a great investment in top tier quality.
Not that many off the shelf actions are not entirely fuctional and reliable, but it's just a sense of satisfaction knowing you have the best.
Those GAPs have a good reputation and many satisfied users no doubt.
