No, it does not fit the Pioneer Arms.
Yes, the Texas Weapon Systems AKM/AK-47/AK-74 Gen-3 Dog Leg Scope Rail Top Cover should work with a PSA AK103. So minor adjustment may be needed due to the differences in specifications between AK variants.
Yes, the Texas Weapon Systems AKM/AK-47/AK-74 Gen-3 Dog Leg Scope Rail Top Cover will work with that rifle.
No, you will need the Texas Weapon Systems Dog Leg Scope Rail Cover Model 33312. You can find that model here:
https://www.opticsplanet.com/texas-weapon-systems-yugo-ak-gen-3-dog-leg-scope-rail-top-cover.html
The Texas Weapon Systems AKM/AK-47/AK-74 Gen-3 Dog Leg Scope Rail Top Cover should work with that Arsenal AK47.
You will need the Texas Weapon Systems Yugo AK Gen-3 Dog Leg Scope Rail Top Cover 33312 at the link below.
https://www.opticsplanet.com/texas-weapon-systems-yugo-ak-gen-3-dog-leg-scope-rail-top-cover.html
The manufacturer does not list that rifle as a compatible model. The Texas Weapon Systems AKM/AK-47/AK-74 Gen-3 Dog Leg Scope Rail Top Cover might work with that rifle but fitment cannot be guaranteed. I recommend contacting the manufacturer to confirm compatibility.
This top cover will be compatible with the PSAK-47 GF3 with an under folding or side folding stock. The correct top cover for a PSAK-47 GF3 with a fixed stock is model MPN:33317.
The Texas Weapon Systems AKM/AK-47/AK-74 Gen-3 Dog Leg Scope Rail Top Cover is only compatible with Arsenal SLR-101, SLR-102 series, SLR-104FR, SLR-105 Series, SLR-106CR, SLR-106F, SLR-106FR, SLR-107CR, SLR-107F, SLR-107FR, SLR-95, and SLR-96. A full compatibility chart can be found linked below:
https://texasweaponsystems.com/compatibility-matrix/
No, the correct model top cover for the M70 is the Yugo version (33312) which can be found by using the link below:
https://www.opticsplanet.com/texas-weapon-systems-yugo-ak-gen-3-dog-leg-scope-rail-top-cover.html