I was finally able to find more information on the Polish homemade firearms
Unfortunatelly the text is in Polish:
http://www.jurek.com.pl/bron2ws/pl/plbs00.php
pistols:
PISTOLET-SAMORÓBKA
6.35mm, 6 shot magazine, length 13,26cm
(unfortunately the online translation was full of mistakes, so I couldn´t find out if the gun is just a copy or a new design and how many gun were built)
submachineguns:
Pistolet Maszynowy "Choroszmanów"
Copy of PPD-40, 22 guns were built from 1943 - 1944
7.62mm, 35 shot magazine, length 51,5cm
PISTOLET MASZYNOWY "BŁYSKAWICA"
modified copy of Sten Mk 2, over 700 guns were built from 1943 - 1944, source claims the caliber of the gun was 5mm, but the gun used Stem magazines, so I don´t think this claim is correct.
pistolet maszynowy "Bechowiec 1"
Built from 1943 - 1944, 9mm, 20 shot, length 45 cm. Source doesn´t mention anything, but from look on the picture I suppose it is an other modified Sten copy
Pistolet maszynowy Samoróbka
20 shot magazine, length 60cm, 9mm; probably built by the same gunsmith as PISTOLET-SAMORÓBKA and Bechowiec 1 ( Henryka Strąpocia); stock from an hunting rifle combined with elements from Sten smgs (?)
machineguns:
rkm F. Teteryka
106,5 cm length, 20 shot magazine, 7.92 mm; again parts from a hunting rifle were used
source of pictures:
http://modeleww2.blog.onet.pl/1,AR2_2004-05-31_2004-06-06,index.html
handgrenades:
R-42
nicknamed "sidolówka", because the body of the gun were similar to the bottles of "Sidol" liquid steel cleaner
ET-40
nicknamed "filipinka" produced from 1940 - 1944(?)
Grenade launchers:
80 mm Łopuski
made from water supply tubes, range about 1km
granatnik Kręglewski i Szuster
grenade laucher made from tubes
"Kubus" armored car:
http://www.linux-penguin.org/achtungpanzer/pol/kubus.htm
bluered