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thirsty said:
fatcat said:
T
If I recall correctly (and I may be wrong here), in semi, a different part ensures the hammer doesn't drop until the bolt engages into battery. ...

So you FS2K owners without the forward sear, you have nothing to worry about, safety-wise.
You are sorta wrong. Let me tell you about the parts involved with the release of the hammer.

In a semi-auto the "secondary sear" holds the hammer back after each shot, until the trigger is released, then the hammer slips of the secondary sear and the "main sear" holds the hammer until the trigger is pulled.

On an FS2K without a forward sear the secondary and main sears are the only parts controlling the release of the hammer. Unlike the forward sear these sears are not mechanically linked to the bolt in any way, so an out-of-battery release of the hammer IS possible.

Fortunately for those without the forward sear you can't pull the trigger fast enough to drop the hammer on the bolt as it's traveling into battery from the last shot. But if something jams the bolt open, or if the secondary sear fails, you could defiantly have a round going off out-of-battery.

I think a PS90 without a forward sear is more dangerous in this respect. In the FS2K the bolt mates into the barrel assembly, and this 1 inch sleeve would likely protect you from the heaviest piece of shrapnel- the bullet.

I don't exactly think that folks without the forward sear should be scared. For one, the bolt has to be mostly closed for the hammer to hit the firing pin. But 'mostly closed' is still out-of-battery, so you could definitely expect a serious jam or parts breaking. A weapon with its forward sear is not only a bit safer, it's also more reliable.
 

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Germanic has a good point about the extractor and an even better point about the bolt carrier.
I hadn't thought of that neat feature of the bolt and carrier.
But and out-of-battery drop of the hammer is a problem whether it causes a detention or not.
I guess it becomes a small factor of increased reliability, rather than one of safety.
Of course the real issue with this whole thing is the legal one, where a forward sear makes it easier to convert the FS2K to full auto.

But it's not true- the above statement-that any FS2K has a full auto trigger pack.
The old FS2K packs are missing a full auto part that I'm not going to describe, and there is another modification, that I also won't describe, that would be necessary to give the FS2K the functionality of an F2K.
 
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