The necessity to relocate the return springs on a para fal have caused some a great deal of torment, the fact is that gun will work fine, just fine, with the stock folded.
On the fixed stock models a tube is threaded into the lower and serves as a guide for the twin recoil springs and plunger.
On the Para models, a different top cover is used, one with a plate at the back, with multiple strong springs which handle the pressure and velocity of the bolt/carrier assy as it moves from battery, back to it's mechanical limits and then forward to strip a new round and travel back into battery.
Using a slightly different lower reciever, no lower tang to secure the buttstock, and no recoil tube, as on the full stock types, the para type differs in that it uses the threaded hole for the tube as the place where it secures, via a big screw, a two-piece aluminum folding knuckle, with a tubular stock pinned into the holes in the back of that knuckle.
The other different major component is the bolt carrier. Instead of a "rat tail" riveted into a slot in the rear, with a small plunger to return it to it's lower position, the para carrier has the top section bored out to accept the recoil springs.
The para top cover, has a lip stamped into the front of it in addition to the different recoil spring system. This is to secure the bolt/carrier and springs as one unit so you can easliy put it on the reciever and slide it into the slots where the top cover goes without having to fight the recoil springs, which are very strong, to make up for thier shorter length.
Hope this helped. D.
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