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Posted: 7/20/2015 2:13:39 AM EDT
[#1]
Somebody will be along in a second to prove me wrong but a 601 style pin will not work as an SP1 upper is not rebated to accept the "ball bearing" detent besides the obvious difference in size.
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Posted: 7/20/2015 2:29:48 AM EDT
[#2]
there's a commercial offering that has the ball bearing outside the lower. basically it's longer and the detent keeps the pin in place.
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Posted: 7/20/2015 2:51:11 AM EDT
[#3]
I don't know if it'll work for every upper, but I have had good luck permanently installing the front bushing and then using the detente pin. The shelf that's created between the bushing and lug dia. difference gives a pretty good engagement surface for the bearing and I've never had my NDS pin walk.
Food for thought... |
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Posted: 7/20/2015 8:29:34 AM EDT
[#4]
That might work if you're using an SP1 upper on a non-SP1 lower but if you're using the lower you will still have the pin diameter size difference issue.
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Posted: 7/20/2015 4:37:09 PM EDT
[#5]
I have one that is dimpled like a real one and the bearing is set back so it rests between the upper and lower lug. I think I got it from HeatnBeat
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Posted: 7/20/2015 5:21:21 PM EDT
[#6]
Thanks! That's exactly what I was hoping for. Maybe I don't have to "engineer" something after all!
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Posted: 7/20/2015 8:34:51 PM EDT
[#7]
Quote HistoryQuoted: there's a commercial offering that has the ball bearing outside the lower. basically it's longer and the detent keeps the pin in place. I got one of those from some guy in TX (^^^^^^) and it works quite well. I'd suggest that the OP send him a message. |
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