PSL flats

[Oldyeller]

Is it possible AKbuilder will ever make PSL/FPK flats? Seem to be a lot of kits around right now. I can only wish!

[Black Canyon prospector]

Now that is a grand idea!

[a-kmanator]

You need the longer bending jig to go with it

[Black Canyon prospector]

This blank from Cold Steel Solutions was a lot of work. I vote for Curtis to please look into this.

[Sevo]

I too would like to try a flat, I sure hope curtis can hook something up

Does anyone else besides centerfire have 100% receivers? How are the 100% receivers from there?

I hope you dont mind asking this in your flat discussion.

[LtDan]

I called Curtiss and talked to him about making the PSL flat and he said the flat is too long. My reply, if you look at a Romanian Rcvr the basic flat is the same length except they have the rear extension plates either riveted or spot welded on. The other issue is the magazine well on a PSL is right to the bend of the flat which leads to a lot of problems with die punching. I told him to spot a couple of holes and send a template cuz I gotta mill in my garage. He chuckled and got another phone call and I left it at that. I went and DROS'ed a built Rcvr from CFS... I hate to tell anybody what I'm doin!

[a-kmanator]

Originally Posted by LtDan

I called Curtiss and talked to him about making the PSL flat and he said the flat is too long. My reply, if you look at a Romanian Rcvr the basic flat is the same length except they have the rear extension plates either riveted or spot

They are not the same length,The PSL is about 3/4 of an inch longer in the front to make room for the magazine see photo in post #3 a standard flat on top with a PSL flat under it for comparison.

Originally Posted by LtDan

The other issue is the magazine well on a PSL is right to the bend of the flat which leads to a lot of problems with die punching.

I undersized the width of the magwell to give the jig something to grab when you fold to get a crisp bend then just widen it post fold.I am now working on the "crimp-er" to do the trunnion bulges.

[Black Canyon prospector]

Nice flat a-kmanator.

Where did you find that, if you don't mind me asking?

[LtDan]

Originally Posted by a-kmanator

They are not the same length,The PSL is about 3/4 of an inch longer in the front to make room for the magazine see photo in post #3 a standard flat on top with a PSL flat under it for comparison.

The basic flat AK74 IS the same length as the PSL on the bench, the difference is the location of magwell,FCG and reinforcing plates attached to the rear of the trunnion which sets the rear trunnion farther to the rear. On the 3rd photo you can see the parting line where the reinforcing plate was notched. Remove those plates and the 2 flats compared are the same length. Not trying to dispute your word or experience at all, I'm just showing what I have in my hand.

[Black Canyon prospector]

Excellent shots leuitenant Dan!

[Oldyeller]

So if Curtis made a M70 flat with the bottom blank- except for line up holes- it may work? I know the dimples would be wrong, but maybe leave those out too. Sure would like to see something come out of this.

[LtDan]

Curtis if'n your listening, Just let us bend it and like I told him a couple of small pilot holes where the mag should be about the size that the center support pilot holes and me and my mill will do the rest. Add a couple of plates for reinforcement in the back and I'll get it rolling. Oh yeah and the lower rails we need those.......

[Oldyeller]

Pleeeeease Curtis!

[tujungatoes]

Originally Posted by Oldyeller

So if Curtis made a M70 flat with the bottom blank- except for line up holes- it may work? I know the dimples would be wrong, but maybe leave those out too. Sure would like to see something come out of this.

Don't forget, the FCG and selector holes have to be moved back also.

[Oldyeller]

Originally Posted by tujungatoes

Don't forget, the FCG and selector holes have to be moved back also.

That is correct, a bulged trunnion 1.5mm blank flat should work, course I bet Curtis could figure out where to put the holes. I bet there is a market.

[akmelee]

I got 2 of the romy receivers from CFS and I can only guess that they are
seconds. 1 of them had the trigger hole placed too far forward and the other had the trigger hole placed too far rearward.These were the hole in the floor not the axis pin holes.Both were usable with some filing,but the one that was too far to the rear I had to remove the rear trigger guard rivet and weld the hole shut and move the hole rearward about 3/32" and re-rivet it.A bit of work but it functions well now.They are made from a good grade of steel and are hardened well.For what it is worth.

[akmelee]

Oh bye the way kman what's that mag from in that pic you posted?

[LtDan]

Originally Posted by akmelee

Oh bye the way kman what's that mag from in that pic you posted?

What he said! Me too I wanna know

[tujungatoes]

I believe that mag is from a finnish lahti.


HEHE cool idea.

[a-kmanator]

"The basic flat AK74 IS the same length as the PSL on the bench"

OK I still have to disagree with this statement and please allow me to explain how I came to this conclusion:If Curtis made a PSL flat and folded it up into a receiver It would look like this NODAK PSL receiver in the squareback variety that measures in at about 11 inches.

Now if you were to take a standard AKM 47/74 receiver that measures 10 1/4 inches and lay it over top of the PSL receiver keeping the rear trunnion portion lined up even you will notice:


A:all the holes line up the same from the trigger guard back
B:even the magwell starts in the same position.
C:The extra length comes from the front trunnion being 3/4 of an inch foward.

Now here comes the best part,If you were to take a dremmel and cut a semi-circular notch out of the 11 inch long psl receiver it will be just like the Romanian part in your photo....11 inches long;

So in conclusion of reverse engineering a PSL receiver I have discovered that It is roughly 3/4 of an inch longer than an AKM/47/74 receiver with the added length in the front of the part to allow room for the extra large magazine......but your results may differ?

And another side note,If Curtis did what you are suggesting and shifted all the holes 3/4 of an inch would it still work in your jig?The jig bolt holes would be covered by the flat on my jig?

[LtDan]

I guess it is how you look at a subject. I measure the bottom of a Romanian PSL and it measures the same as a bent rcvr that happens to be an AK74. What I do see is that the rear trunnion is mounted in extension plates that are riveted to the rcvr. Everything has to move to the rear because of the length of the action to work the 7.62 x 54R cartridge. As far as the die and punch haven't explored that yet. That will take some serious consideration.

[a-kmanator]

Tomatoes...tamotoes

[akmelee]

It could be done easiest by laying out the flat on the ak length blank and bending it and adding the length with spot welding on the heavier plates at the rear...just as the romanians did.

[LtDan]

Originally Posted by akmelee

It could be done easiest by laying out the flat on the ak length blank and bending it and adding the length with spot welding on the heavier plates at the rear...just as the romanians did.

Except for the magwell, trigger guard position, FCG position and the fact that the flat holes would have to line up with the existing die and punch.

[a-kmanator]

Originally Posted by Black Canyon prospector

Nice flat a-kmanator.

Where did you find that, if you don't mind me asking?

I make them on my CNC plasma table

[SLUG36]

Originally Posted by a-kmanator

I make them on my CNC plasma table

YOU SHOULD MAKE SOME FOR SALE!!

[TheGreek!]

Originally Posted by a-kmanator

You need the longer bending jig to go with it

More info on that big mag please....

[a-kmanator]

Originally Posted by SLUG36

YOU SHOULD MAKE SOME FOR SALE!!

I would still need to press the trunnion bulges in...after it is folded

[Black Canyon prospector]

Nice shots K-MAN!

[TRX]

A-Kman, can you tell us some more about your bulge press?

It looks like maybe you made a lever that fits through the blank, and you're pressing it down on the bulge end.

Did you cut a female die for the outside to accept the bulge shape, or is it just formed by the internal die?

[a-kmanator]

Originally Posted by TRX

A-Kman, can you tell us some more about your bulge press?

It looks like maybe you made a lever that fits through the blank, and you're pressing it down on the bulge end.

Did you cut a female die for the outside to accept the bulge shape, or is it just formed by the internal die?

Yes,I added .125 layer to the top and left a recess for the lever to press into.

[Russian 54r]

I acquired a SS shell, from I don't know where, about three years ago and am fixing to make a big mistake by using it to make a RPK barreled PSL in 7.62x39. I'm re-thinking the build, in order to save my shell, and going to try and find a bulged Yugo flat for the build. I already own a Romy PSL and want to make something different. Anyone have a Yugo fixed stock flat they want to sell?

[SAVAGE11]

Originally Posted by Russian 54r

I acquired a SS shell, from I don't know where, about three years ago and am fixing to make a big mistake by using it to make a RPK barreled PSL in 7.62x39. I'm re-thinking the build, in order to save my shell, and going to try and find a bulged Yugo flat for the build. I already own a Romy PSL and want to make something different. Anyone have a Yugo fixed stock flat they want to sell?

Here did you get that barrel?

[Russian 54r]

Originally Posted by SAVAGE11

Here did you get that barrel?

I got it from a fellow forum member AK-Kimba! Said he had it sitting around for awhile and wasn't going to build with it.

[a-kmanator]

Originally Posted by Russian 54r

I got it from a fellow forum member AK-Kimba! Said he had it sitting around for awhile and wasn't going to build with it.

It looks like a early green mountain rpk barrel before they parkerized them and the receiver shell I would almost bet the farm on is a cold steel solutions PSL sample.