5R rifling is usually a sort of rifled barrel that is characterised by 5 equally spaced lands and grooves. This layout is alleged to further improve precision and consistency by cutting down friction and muzzle bounce. 特に、今まで過剰消費型の生活をしている方は、ごみを捨てない習慣は、なかなか身に付かないものですね。少しずつ、心がけるようにしましょう。 5R rifling is actually a form of ... https://danteqwbgi.activosblog.com/27677877/not-known-facts-about-rocastine