So I just got an SP5 and I plan on sending it and my German MP5SD kit off to have it built but my question is, should I reuse the already installed German barrel, or buy one of the new B&T barrels and use it? Obviously the original barrel is German, but it has an unknown round count through it and the B&T is new. What do you guys think the best choice would be?
B&T would be a good choice, since you will have a ton of $ wrapped up in the project; may as well have a new barrel installed. Sell off the old one to recoup some of the expense. I have a RCM in my SD works very well and accurate.