NEMO Arms .300 Blackout Custom Carbine Buffer Spring Black

NEMO Arms .300 Blackout Custom Carbine Buffer Spring Black. 300 Blackout Carbine Buffer Spring. NEMO Arms has engineered a custom carbine buffer spring for carbine length gas systems or troublesome .300 Blackouts that are undergassed. This spring was designed around a rifle with a 16? barrel and a carbine gas system. This spring will also work with other This reduced stiffness buffer spring will allow your .300 Blackout to cycle properly with subsonic ammunition. The spring is made from 17-7 sta