Czgunner Posted January 26, 2022 Report Share Posted January 26, 2022 Is this: https://jprifles.com/buy.php?item=BC-PINS-308 compatible with the DPMS pattern? I would be using in a Stag lefty. I ordered and was looking at the parts. The firing pin is a smidge different length, but pin protrusion looks the same. The cam pin is a bit different. One edge is flat. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted January 26, 2022 Report Share Posted January 26, 2022 17 minutes ago, Czgunner said: The cam pin is a bit different From? That kit should work BUT there is a "high pressure" bolt that uses a different pin, I would think they would have called that out but details matter. Quote Link to comment Share on other sites More sharing options...
Czgunner Posted January 26, 2022 Author Report Share Posted January 26, 2022 The cam pin that came with the "kit" from JP has the flat shoulder. There is nothing on the package about it being high pressure. Quote Link to comment Share on other sites More sharing options...
DustBuster Posted January 27, 2022 Report Share Posted January 27, 2022 My cam pins with my two dpms compatible bolts look exactly like that one. Roundish on the fore/aft and flat on the top and bottom. Quote Link to comment Share on other sites More sharing options...
Czgunner Posted January 27, 2022 Author Report Share Posted January 27, 2022 3 minutes ago, DustBuster said: My cam pins with my two dpms compatible bolts look exactly like that one. Roundish on the fore/aft and flat on the top and bottom. Thanks for the info. The round part faces the breech? Quote Link to comment Share on other sites More sharing options...
DustBuster Posted January 27, 2022 Report Share Posted January 27, 2022 (edited) 1 hour ago, Czgunner said: Thanks for the info. The round part faces the breech? Well, it has kind of a rectangle head..two rounded corner sides and the flats. The firing pin goes through it, so it will only assemble one way. When I took my bolt carrier apart to do the Headspace check the first time, I tried to put it back in the same orientation... but I think the cam pin is perfectly symmetrical so it doesn’t matter if you flip it 180 degrees. You’ll see when you tear apart your existing carrier. AR-10 armalite bolts/carriers/parts might be different, I’ve never messed with non-dpms stuff. Edited January 27, 2022 by DustBuster Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted January 27, 2022 Report Share Posted January 27, 2022 33 minutes ago, DustBuster said: but I think the cam pin is perfectly symmetrical so it doesn’t matter if you flip it 180 degrees. I've never seen the difference myself but I have heard from knowledgeable people that it does matter down the road. You want the cam pin back in the same way, something to do with a consistent wear pattern, said parts last longer. I first heard of it is when getting a BCG that had an arrow on the cam pin. I thought I was being smart by flipping them to get even wear, go figure. Quote Link to comment Share on other sites More sharing options...
Czgunner Posted January 27, 2022 Author Report Share Posted January 27, 2022 Just got an email back from JP. "Yes, it's a DPMS pattern. Enjoy!" Hope this helps somebody going forward. Seems like a decent bag of spares for the price. Quote Link to comment Share on other sites More sharing options...
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