Major Parts and Actions Flashcards
7 cards from real CRFSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Major Parts and Actions flashcards as text
What is the role of the barrel's crown (the recessed end of the muzzle)?
Answer: To protect the rifling at the muzzle and ensure uniform gas release for accuracy
A properly cut crown protects the vulnerable end of the rifling and ensures propellant gases escape evenly around the bullet, which is critical for consistent accuracy.
In a lever-action rifle, which component strips a round from the magazine and positions it for chambering as the lever is worked?
Answer: The carrier (lifter)
The carrier (or lifter) rises to catch a round from the tubular magazine and align it with the chamber as the lever is closed.
What distinguishes an 'open' bolt design from a 'closed' bolt design in a firearm?
Answer: Open bolt fires with the bolt held rearward; closed bolt fires with the bolt forward
In an open-bolt design the bolt rests rearward until the trigger is pulled, then moves forward to chamber and fire the round; closed-bolt designs keep a round chambered with the bolt forward.
What is the function of the magazine follower?
Answer: It pushes rounds upward under spring tension so they feed reliably
The follower is a platform pushed upward by the magazine spring, keeping rounds elevated and properly angled so they feed reliably into the action.
On a semi-automatic pistol, what component holds the firing pin (or striker) under spring tension until released by the trigger?
Answer: The sear
The sear engages a notch on the hammer or striker and holds it cocked under spring tension until the trigger pull causes the sear to release it.
What is the purpose of the forcing cone in a revolver barrel?
Answer: It provides a tapered transition that guides the bullet from the cylinder into the rifled bore
The forcing cone is a tapered section at the breech end of the revolver barrel that guides the bullet from the slightly misaligned cylinder into the rifled bore without distortion.
What part of a semi-automatic pistol feeds cartridges from the magazine into the chamber?
Answer: The barrel ramp (feed ramp)
The feed ramp is a polished inclined surface on the barrel or frame that guides the nose of the cartridge upward and into the chamber as the slide moves forward.