forearm vs handguard

forearm

noun
  • A section of the weapon between the receiver and the muzzle, used to hold the firearm steady. 

  • The part of the arm between the wrist and the elbow. 

verb
  • To arm in preparation. 

handguard

noun
  • A guard on the front of a weapon for hand and finger protection, or to allow for attachments to the weapon. 

How often have the words forearm and handguard occurred in a corpus of books? (source: Google Ngram Viewer )