Noun
buttstock (plural buttstocks)
The stock in a firearm located in the rear of the firing mechanism where one's shoulder is held when shooting
Defensive shotguns sometimes have no buttstock or will have a folding stock to reduce overall length even more when required. Source: Internet
Equipped with a standard buttstock, the “pistol” would be an NFA firearm. Source: Internet
The M16A2 fires the improved 5.56×45mm NATO (M855/SS109) cartridge and has a new adjustable rear sight, case deflector, heavy barrel, improved handguard, pistol grip and buttstock, as well as a semi-auto and three-round burst only fire selector. Source: Internet
A shotgun is defined as a weapon (with a buttstock ) designed to be fired from the shoulder. Source: Internet
It had a spring-powered, removable tube magazine in the buttstock which held seven rounds and could be reloaded by inserting spare tubes. Source: Internet
The buttstock was lengthened by convert. Source: Internet