If you play in a CQB arena and want that tactical edge over players using mk5 type pyro then a reusable grenade could be what you are looking for.
The Alpha Tec Hex Gen2 grenades have been improved over the first gen grenades with a thicker side wall and improved firing pin to increase the reliability of the grenade.
The grenade is capable of taking 9mm or 209 primers making it usable at most sites depending on noise limits.
Unlime some other grenades on the market the Alpha Hex grenade already comes with a Multishot base as standard giving you more bang for your buck in fact 6 shots.