IE: Replacement pins won't fit the BCL BCG.
Also of note, the BCL firing pin has a spring, the Brownells does not. You cannot (that I have tried and succeeded at) get an aftermarket DPMS firing pin to function in the BCL BCG.
I'm running a Fulton NiB-X bolt and Fulton reduced tip firing pin in the BCL BCG and it function tests fine. Paired with the FA Criterion lightweight barrel.
The spring that came in my BCL BCG works with the Fulton pin, call me paranoid but I don't want a free floated firing pin in a gun that slams the bolt home this hard.
Edit: I've also got a first run BCL102, your mileage may vary. My BCG looked fine, definitely no reason to change it and the machining where the gas rings actually stroke is good. It looks better than some DPMS brand BCG's I've seen.




















































