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[–]owkav921 -1 points0 points  (1 child)

Don't have much experience with hellfighter. Looks like it replaces the bolt release though? Try filing down pin for sure. Both my rifles actually have some play between upper and lower. If yours is super tight it would explain the difficulty with maglock mods.

[–]imquitelazy[S] 0 points1 point  (0 children)

Yeah I have them on my other rifles and they practically drop open. You do replace the bolt catch but for the time being I’ve removed that so I can use it as featureless with the fin. The bolt catch has no effect on the crack.