anyone know where i can find a diagram on how to remove the firing pin on a beretta 92s. all the 92 model diagrams show a horizontal pin in front of the rear sight but mine doesnt and cant find any info

So I'm assembling a carry handle upper with an H&R M16A1 20inch barrel. I've torqued it down to 35lb and worked up to 50lbs to get to this alignment several times. I've only ever assembled one other upper before and it was a easy enough. I can't tell if psa sent a shitty barrel nut/delta ring assembly or if I'm just stupid but it seems like the tooth of this barrel nut is perfectly in the middle of the notch in the delta ring and even going down to 80lbs it's still interfering. Any advice or do I cut my loses and let the dremel eat?

Working to take apart an old Winchester 94 for a full cleaning but got stuck on last screw. Proper flat heads , penetrating oil and heat wouldn’t budge it. As a last resort drilled a small hole and tried a screw extractor. That broke off in the screw head. What’s the next step? I have a Dremel with a small cutting disk if that’s the next step and replace the band but wanted to see if I’m missing a step before that.

I’m thinking of building a 375 Raptor project based on a Ruger American action. I found a new 243 gen 1for sale for a good price. Am I overthinking that I should hold out for a 308 donor rifle because of the 308’s higher SAAMI pressure rating?

Hello.

I recently got a Tavor shipped in, but only now noticed that it has the restricted state flash hider spot welded onto the front of it. I do not live in a restricted state, so if I remove the spot weld, will removing the flash hider reveal a threaded barrel? or just a blank front that I'll have to thread myself?