Basic operations of small arms Flashcards
What are the eight steps of the cycle of operation?
- Feeding
- Chambering
- Locking
- Firing
- Unlocking
- Extracting
- Ejecting
- Cocking
What are the three feeding mechanisms?
- Magazines
- Belts
- Clips
What are the five types of cartridges?
- Rimmed
- Semi-rimmed
- Rimless
- Belted
- Rebated
What are the five varieties of firing pins?
- Free-floating
- Inertia
- Percussion
- Striker
- Fixed
What are the only three ways firing pins receive their energy?
- A larger mass strikes them (free-floating)
- A spring provides their energy
(inertia, percussion, striker) - Their own mass provides the energy (fixed)
What are the two types of primers?
Boxer and Berdan
What are the eight types of locking systems?
- Rotating bolt
- Rising/lowering bolt
- Swinging bolt
- Rising barrel
- Rotating barrel
- Rollers
- Locking block
- Locking flaps
List the eight operating systems.
- Bolt action
- Manual pump
- Revolving cylinder
- Blowback
- Delayed blowback
- Recoil
- Recoil with gas assist
- Gas operation
What are the three types of gas systems?
- Gas blast
- Gas tappet
- Gas direct (direct impingement)
What are the three types of magazines?
- Box
- Drum
- Pan
What are the two types of links for belt-fed weapons?
- Split link (SL)
2. Fully encased (FE)
What are the two types of link belts?
- Non-disintegrating
2. Disinterating
What are the two types of clips?
- En-block
2. Stripper
How do the three leaves of the sear spring function in the 1911?
The left applies constant forward pressure on the sear; the center provides constant upward pressure on the disconnector; the right applies constant rearward pressure on the grip safety.
What is the difference between Boxer and Berdan primers?
Boxer–one large, central flash hole; anvil and flash powder built in.
Berdan–Two smaller flash holes. Only flash powder built in. Anvil part of the cartridge case with two flash holes. Non-reloadable.
