Great price. Buy in multiples 2,3,4 etc. This part gets jacked up after disassembling the gun over the years. If you put an Apex ambi slide stop you'll need a new spring. Useful item to keep on hand.
Good product! A pain in the ass for removing the iron sight of the non-OR Shadow 2, but it goes perfectly with the Holosun 507. And with the iron sight remover, it's no problem.
![CZ Bren 2 Hauptfeder [7.62x39] | Teil #90](http://www.cz-parts.ch/cdn/shop/files/CZ_Bren_2_main_spring__7_62x39____part__90.jpg?v=1773303341&width=1214)