I have a NFA Gen2 Polly lower that needs clearancing rear take-down pin-channel. The Grizzly upper will fit in the front lug, but the rear lug doesn't sit in the channel. Can I grind /shave a little bit to make it fit, w/o jeopardizing the integrity of the lower?
I would like to hear from anybody & especially from NFA on opinions/solutions.
Thank you.
I would like to hear from anybody & especially from NFA on opinions/solutions.
Thank you.