Originally Posted by antelope_sniper
Originally Posted by cwh2
Well, those videos convinced me to at least upgrade one BCG while they are available. Got this Geissele from Primary Arms
https://www.primaryarms.com/geissele-automatics-m4a1-bolt-carrier-group


Of all his video's on BCG's I've watched so far, the Geissele did about the best:



It should................that's their high end BCG & it sells for $300.

Geiselle Reliability BCG

Their more mundane version is plain jane, manganese phosphated & goes for $140.

Haven't used either version but most Geiselle stuff works as advertised, though most is on the very expensive side.

MM