BreechFace
Member
- Joined
- Mar 2, 2020
- Messages
- 3,512
@BreechFace already answered the why, that’s the Radian SD (side discharge) thus the holes. That one is gone to a new home as I sold the pistol but future plan is to suppress one and purchase another SD for it.
So you feel it does help with the blowback? I’ve never used one.