(Continued from Part 1. This concludes the article.)
AMMUNITION: STOCK UP ON 5.56 SUBSONIC AMMUNITION
I like to use Beck brand subsonic ammunition as they are good quality cartridges and best for this scenario. Subsonic means that it doesn’t break the sound barrier so there is no secondary boom (or “crack”) when firing. The first boom (from the powder charge) is silenced by the suppressor, and there is no secondary hypersonic boom, beyond the suppressor. Hopefully, that makes sense to everyone. Use subsonic ammunition in situations where you need to be nearly silent.
One caveat is that subsonic ammunition is not powerful enough to push the bolt carrier group on the AR-15 of the upper receiver all the way back to cycle the next round to allow semi-automatic fire. But you can work around this issue. Fire your sniping shot from your subsonic ammo magazine. (My magazines have green tape at the bottom to ensure I know they are not for semi-auto use.) Then manually cycle each cartridge by pulling the charging handle back, and releasing it.
Should a Close Quarter Battle (CQB) ensue and you need rounds that can cycle the bolt carrier group in the upper receiver for fast semi-automatic rifle then you simply swap that magazine out with your supersonic ammo magazine. (One without the green tape). But do not forget to cycle the bolt carrier group manually once, after the magazine is swapped out. That will ready your rifle for semi-auto fire.Continue reading“A Subsonic 5.56mm AR – Part 2, by R.A.O.”


