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I dont own a ps90 yet but im going up to my uncles next weekend and ill look on it then but could you...put it on the side of the bolt? And make a realse maybe somewhere under the thumb hole?
 

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I looked, and couldn't find an old thread about this issue. This was discussed early to mid 2007.

Apparently, the Europeans don't typically incorporate this into a lot of their weapon designs - as many other weapons that come from there doesn't have the bolt stay open after the last round.

There was some other reasons for this as well, but I no longer remember why.
 

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It probably has something to do with the way the magazine fit into the receiver. Just a guess on my part though. Isn't the receiver sitting kind out back in the stock when you charge the weapon? The only way you could build a relable stop would be to make the charging bars connect directly to the bolt. But that mean that they would go back and forth with every shot. Maybe I'm wrong. I didn't design it, I just shoot it.
 

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The trap door in the ejection port operates as a dust/dirt cover and a bolt hold-open device. Open the bolt and hold it back, close and latch the trap door. The trap door has a small knob to hold the bolt. Give the handle a pull back and release the bolt sharply to open the trap door and close the bolt. Not very elegant llike a last shot hold open, but it works on firing ranges that require your bolt be held open for safety.
 

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lightfighter said:
on the range, i find it easier to simply pull the reciever and lay down two parts.

as far as i know, the euro mentality is simply that holding the bolt open is just not needed, and "thats the way its always been"

Probably figure with a see-thru mag you don't need a hold open.
 

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I've thought about how cool it would be to have bolt hold open on the PS90 too.
But I can't thing of a way to make it work.
You know most bolt hold open on rifles works by a part that is pushed up by the magazine follower into the path of the closing bolt.
In the case of the PS90 the follower isn't longer than a round- so you can't have a part that is pushed by the follower, and not a round (besides, the follower stops at 45 degrees rotation).
I guess it could be done electronically. A magnet in the follower, a sensor, battery, solenoid, and release button would do the trick.
But that's getting a little crazy.
 
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