Sully Here

[Sully]

Greetings. I just stumbled across these forums. I surf many other forums. I'm have a long history of teaching firearms repair, machining on guns, and I design and make gun parts and gun tools.

CY6
Greg Sullivan "Sully"
WeaponsArmorer
SLR15 Rifles
Defensive Edge Training
(763) 712-0123

[Sully]

Hi i am new to the forum, it would be great if you could share your process of repairing a gun

What we teach when looking at firearms repair, is you need to diagnose the issue. This is based on the 8 cycles of operation, sometimes referred to as the 8 cycles of fire.

All guns have these 8 cycles:
Feeding
Chambering
Locking
Firing
Unlocking
Extracting
Ejecting
Cocking

You can apply this to any firearm. A simple one to look at is a bolt action. On a bolt action you take around of ammunition and place it inside the ejection port, or insert a magazine of ammo into the receiver until it locks into the receiver, or you have a top loading magazine. As you manually push the bolt forward, the bolt will strip a round of ammo off the magazine, and push it forward into the chamber. This is what we call Feeding.

The round of ammo is then pushed into the chamber as you push the bolt all the way forward until it stops, this is called Chambering.

With the bolt pushed all the way forward, you push the bolt down to rotate it, so it locks into the receiver. This rotating bolt locks the bolt lugs into the receiver, and locks the round of ammunition into the chamber. This is called Locking into battery.

Now press the trigger. On a bolt gun, the firing pin will be released and launched forward so it strikes the ammunition. When the firing pin strikes the ammunition, the primer ignites, and creates burning gun powder which results in gas pressure building and pushes the projectile down the barrel. This is called Firing.

Once the ammo is fired, you rotate the bolt handle, which causes the bolt lugs to rotate and unlock from the receiver. This is what we call Unlocking from battery.

Most modern bolt action firearms will recock the firing pin as the bolt is rotated and unlocks from battery with the receiver. This is called Cocking. There are older Krag type rifles, and more modern 22LR rifles like the Crikets, where you have to manually cock the firing pin by hand.

Now as you pull the bolt handle rearward, it will pull the empty cartridge from the chamber. This is called Extracting.

As you continue manually cycling the bolt rearward and extracting the empty cartridge, the empty cartridge will eventually be pulled rearward enough to clear the ejection port, at which time the ejector will push the empty cartridge out the ejection port. This is called Ejecting.

Then it starts all over again as you push the bolt handle forward again to feed, chamber, lock, fire, unlock, extract and eject again.

So when a gun isn't working, which cycle is it not doing, and that will tell you where to look for the issue. There are generally about 3-5 things that make each cycle happen.


CY6
Greg Sullivan "Sully"
WeaponsArmorer.com
SLR15 Rifles
Defensive Edge Training
(763) 712-0123

[BKinzey]

Very nice reply and welcome to the forum.

Unfortunately I believe that question was a post from a Bot, so I deleted it. If they aren't, they are free to post again on the forum.