X-Factor
I don't say please
So having just learned this a "drop in"on a standard lower...is it worth doing? Cost efdective as an alternative caliber? My understanding is that even PMags "can" be used (limited capacity and not perfect) and even the standard buffer too. Educate me lol. I'm intruiged. Have a 30-06 bolt gun and ammo I'll trade for an upper. Just sayin lol