This example of the Extremely Rare PP-19 BIZON is built on a Recreator Blanks receiver with a real Bizon parts kit by Halcyon Defense. This is one of the Rarest Russian sub guns that you can own here in the U.S.. This is one of two known to to have been built! It has the original helical magazine that holds 53 rounds of 9x19mm! The Bizon operates on a straight blow back system. It has 1/2-28 tpi on the end of the barrel so you can thread your favorite suppressor directly to the barrel.