||I've tried alot of Bio BBs and these Rock.
They shoot straight and I like them better than the TSD .26 which used to be my favorite, I like these better. They never Jam or double feed like some Bios.
I have used them in Several different Guns and they all get along great with these BBs.
These are fine for any FPS in my opinion.
Guns I use these in are;
G&G GR15 Raider Blowback (M4) - 330 FPS
Galaxy G5K (MP5K) - 330 FPS
TSD XM8 - 330 FPS
GI-G4A1 (M4) - 380 FPS
KJW M9 Full Metal Blowback - 340 FPS
JG M4 S-System 2010 - 420+ FPS
Umarex MP5 - 330 FPS
Echo1 M14 Socom 380 FPS
BBs Work perfect every time.
Rating: [5 of 5 Stars!]