brand new M305 slam fire
- Thread starter estampidate
- Start date
I totally agree with you Robert, I have seen a few guns with swarf in the internals, the grease can glue it all together and jam the pin.
My advice is take it back, tell them you made a mistake ordering the Norc.
Unless I misunderstand the interaction between the bolt, firing pin and safety bridge, if the firing pin is jammed forward that tightly wouldn't the bolt then fail to rotate into battery at all?
edit - thanks 45ACPKING, that's what I thought.
Sometimes the heavier Autos will slam fire if the primers are to thin, to check load a couple of rounds fire one, check the next one that goes into the chamber to see if there is a dent in the primer, never heard of to many trigger issues from the factory.
I know you can get a spring retainer for the SKS that holds the pin back, to prevent primer strikes.
I know you can get a spring retainer for the SKS that holds the pin back, to prevent primer strikes.
It can happen with substandard machining tolerances that allow to much slop in internals
Here is the warning right out of the M1A Manual
î€
WARNING
The M1A is designed and built to specifications to shoot standard factory military 7.62 NATO ammunition.
The specifications for standard military ammunition include harder primers to withstand the slight indentation from the firing pin when the bolt chambers a cartridge. This slight indentation is normal. The use of civilian ammunition with more sensitive primers or handloads with commercial primers and/or improperly seated primers increase the risk of primer detonation when the bolt slams forward. This unexpected "slam fire" can occur even if the trigger is not being pulled and if the safety is on. Use of military specification ammunition will help avoid this.
Right out of the Manual
Last edited:
Never had these issues with my Springfield M1A.I just don't claim to be a expert then flip flop it can and cannot, also saying don't take internet people advice. I'm taking the mechanics troubleshooting eye to what cause it. AND who knows may get another DUD, but main reason is why is it doing this. Goes back to did they clean it. I know something ya just don't cheap out on. Simple don't want to spay a little brake cleaner down the hole to see if anything comes out. Then well return it.
A quick FYI
M1a’s, M1 Garand's, M1 Carbines, and Mini 14’s have the same bolt firing pin receiver bridge configuration. On these rifles the firing pin is not retracted until cam is down. Prior to then the free floating firing pin is free to strike the primer.
This is the point at which the firing pin tang engages the receiver bridge. The firing pin is fully forward and able to engage the primer.
Lot's of theories yes.
Thanx for the lessons The Baby Wolf
I've come to the conclusion that I should just stay away from offering advice hehehe a decade building , tuning , repairing , customizing and shooting many 100's of these rifles coupled with instructing some 27 ish M14 clinics..... Really doesn't count for much when giving advice about a problem on the internet. LOL
Where's tactical teacher's advice to the OP's question.... Paging Barney.... His response will be more widely accepted I know
Thanx for the lessons The Baby Wolf
I've come to the conclusion that I should just stay away from offering advice hehehe a decade building , tuning , repairing , customizing and shooting many 100's of these rifles coupled with instructing some 27 ish M14 clinics..... Really doesn't count for much when giving advice about a problem on the internet. LOL
Where's tactical teacher's advice to the OP's question.... Paging Barney.... His response will be more widely accepted I know
Maybe you should change your handle back to M14Doctor
p.s. I'll take your advice any day......Laz's too if he were still around.
Lot's of theories yes.
Thanx for the lessons The Baby Wolf
I've come to the conclusion that I should just stay away from offering advice hehehe a decade building , tuning , repairing , customizing and shooting many 100's of these rifles coupled with instructing some 27 ish M14 clinics..... Really doesn't count for much when giving advice about a problem on the internet. LOL
Where's tactical teacher's advice to the OP's question.... Paging Barney.... His response will be more widely accepted I know
p.s. I'll take your advice any day......Laz's too if he were still around.
Lot's of theories yes.
Thanx for the lessons The Baby Wolf
I've come to the conclusion that I should just stay away from offering advice hehehe a decade building , tuning , repairing , customizing and shooting many 100's of these rifles coupled with instructing some 27 ish M14 clinics..... Really doesn't count for much when giving advice about a problem on the internet. LOL
Where's tactical teacher's advice to the OP's question.... Paging Barney.... His response will be more widely accepted I know
so if your sooo educated on these, Why didn't you question the cleanliness of the bolt ( knowing that it can pay a factor ) That what a tech or someone with knowlege would asked first, yet quick to say return it.
Not bashing so don't take it to heart, a tech talking to a tech. That would be the first question I would ask if someone came up to me with this problem.
To be honest this should not be a factor with a brand new rifle....dirt usually builds up with use..
M305 are packed in oil not grease.....so that cant be an issue....
Brand new rifle, still under warranty....correct advice was given.
(dont see your dad on here much anymore)
Ive seen it with new rifles, haven't been properly cleaned during assembly. I also seen new rifles with sticky pins/parts because of the storage oil. Depending how long stored the oil turned into sludge. Doesn't take much to gum something when dealing with thous of a inch of clearance.
Pretty sure pops gave up on this place.
Phat Eagle
CGN Ultra frequent flyer
- Location
- Fraser Valley, BC
^^^ Trust Thomas... He knows these rifles in and out...
