Yes, this Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard will be compatible with Thye Century Arms VSKA.
This Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard is compatible with Riley Defense RAK-47 rifles (RAK-47 series, RAK-74 series, AK47 MFT).
No, The Zastava M70 requires the Yugo pattern top cover, 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
The Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard should fit the KR-103 Fostech Rifle.
The top cover included with this bundle is compatible with Saiga 5.45x39 IZ-240, Saiga 100 Series AK47 Rifles, and SAIGA (Izhmash) .308, 7.62x39, 5.45x39, and 5.56x45 (.223) Models. The handguard will fit stamped receiver rifles with standard smooth front trunnion.
Yes, the Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard, should fit the PSA AK47 GF3.
I recommend using the Texas Weapon Systems Yugo AK Gen-3 Short Top Handguard model at the link below for the M70 ZPAP. The Top Cover at the second link below will also work with the M70 ZPAP. This Model Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard, AKM/AK-47/AK-74 might work for a VEPR Series Rifle if it is VEPR Series 1 rifle.
https://www.opticsplanet.com/texas-weapon-systems-yugo-ak-gen-3-short-top-handguard.html
https://www.opticsplanet.com/texas-weapon-systems-yugo-ak-gen-3-dog-leg-scope-rail-top-cover.html
The Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard, AKM/AK-47/AK-74 will fit a Riley Defense RAK47.
This Texas Weapon Systems AKM Bundle will fit the Century Arms AES 10B, Century Arms AKMS, Century Arms AK63D, Century Arms BFT-47, Century Arms RH10, and Century Arms WASR 10-63.
The Texas Weapon Systems AKM Bundle / Gen-3 Dog Leg Rail & Gen-3 Hand Guard, AKM/AK-47/AK-74 should work for the KR103.