The Combat Knife is the standard wargear for all Space Marines.
It is made of Ceramics with a monomolecular edge. 
  
The Frag Grenade is the standard grenade in the 40k universe.
If it explodes it catapults dozens of razorsharp shrapnels which cut through armour and flesh. 
  
The Bolt Pistol is the little brother of the Bolter.
It has a decreased range, less rate of fire but the same penetration power. 
  
The Bolter is most commonly used by Space Marines as their standard armament since the Great Crusade.
It fires an explosive tipped projectile called a bolt and is one of the deadliest weapons in mankinds arsenal. 

