If you only make one change or addition to your Saiga-12, the MD Arms V-Plug should be it!!! Anyone that owns a Saiga-12, from a full length IZ-107 down to a 8" Short Barrel Shotgun, will benefit from the MD Arms V-plug no matter what ammo you use.
The V-Plug plug has many improvements over the factory plug and other aftermarket plugs. Installs in minutes simply by unscrewing the factory plug and screwing the V-Plug back in.
The V-Plug has 5 settings compared to the factory's 2!
Why do you need to replace the factory gas plug with the MD Arms V-Plug? To prevent damage and accelerated wear to your gun and it's parts. Because even at best, the factory plug with it's limited two settings, leaves your Saiga-12 over gassed with some makes of ammo. Also, depending on your specific gun, the factory plug may allow low brass to function on the high brass setting. If so, that means you basically have a one setting Saiga-12, that is majorly over gassed with everything but low brass... This is mostly to blame on the random start of the threading on the factory plug and in the gas block (please view comparison pics below). Another source of the blame is that the factory plug only has 2 settings. The PKM and RPD have 3 gas settings and fire rifle ammunition that has A LOT less variation in powder charge and projectile weight from one type to the next when compared to the vast array of 12ga ammunition types in 2 3/4", not even considering the array of 3" types. The 2 setting factory Saiga-12 plug isn't even close to sufficient for the variations of 12ga ammo.
When on the low brass setting the MD Arms V-Plug plug better utilizes the gas from the low power ammo, slightly increasing the cycling power of the gun.
And the biggest benefit of the V-Plug is it has 4 different medium to high brass settings. Unlike the factory plug, the V-Plug allows you to adjust the gas system to prevent the high power ammunition types from over gassing your system. The MD Arms V-plug is second to none when considering both factory and aftermarket plugs, in regards to regulating the gas flow in your Saiga-12, PERIOD!
Other improvements of the MD Arms V-Plug...
The threads start in the same place on every V-Plug and all will stop in the same place in the same gun. But because the factory threads in the gas block are random it is impossible to make the plug stop at the same point in every gun. With the factory and other aftermarket plugs you can lose settings because the plug has to be backed out to far to reach it's settings. With other aftermarket plugs your setting spectrum can be split in half not allowing them to be used in a graduating scale, making your setting spectrum confusing. The MD Arms V-Plug has 2 complete sets of it's 5 settings spectrum opposite of each other. This ensures the V-plugs settings can be used in a graduating scale in every gun and also prevents the loss of settings from having to back it out to far. The MD Arms V-Plug is the ONLY plug to offer this consistency!
The V-Plug has a shallow pocket in it's face. This allows for much more plastic fouling to accumulate without it interfering with the piston or ports, unlike the factory or other after market plugs. This pocket also helps plastic fouling better burn up increasing it's surface area to the hot gasses. And reduces plastic fouling in the threads by better directing it away from them.
It is finger adjustable, unlike the factory plug which requires the locking pin to be depressed with a tool to change settings. You can turn the V-Plug by hand without manually depressing the locking pin. And if it does become to hot or to tight from dirty threads to adjust by hand it has over-sized tool slots that will easily except a variety of different pry tools. The V-Plug also has a band in front of the threading that is slightly thicker to better seal off fouling from the threads.
The V-Plug is hands down the best Saiga-12 plug available!