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Posted: 7/13/2018 2:32:30 PM EDT
[#1]
Being that the lower is alum, i guess you could force a steel set screw in there, but why not just do it right. A small tap doesnt cost that much, I got my set screws from the hobby store, buy a dozen for 1.00 or so and then youll have them.
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Posted: 7/13/2018 4:24:09 PM EDT
[#2]
Quote HistoryQuoted:
Being that the lower is alum, i guess you could force a steel set screw in there, but why not just do it right. A small tap doesnt cost that much, I got my set screws from the hobby store, buy a dozen for 1.00 or so and then youll have them. My nagging suspicion is that if this were easy more people would have done it. |
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Posted: 7/13/2018 4:33:04 PM EDT
[#3]
Ive never done the bolt catch pin, the idea of the rear take down pin mod is because ppl were changing stocks more often and wanted the spring and detent "captured". I do this mod on all my lowers, it takes literally 2 minutes and then you dont have to worry about it.
Once this trend started to catch on many years ago, a few lower manufacturers were doing this mod on their own. |
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Posted: 7/13/2018 4:36:34 PM EDT
[#4]
The captured rear detent spring made sense to me, although I've never done it since I don't swap stocks regularly.
I'm interested in the reasoning for the bolt catch though. |
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Posted: 7/13/2018 4:51:33 PM EDT
[#5]
Quote HistoryQuoted:
I'm interested in the reasoning for the bolt catch though. They are nice though. A kid at the shop bought 2 F1 branded lowers with that threaded pin. Cool part was, I bought the 2 lowers from him that he fucked up installing the roll pins, cheap. He didn't want them because they were not pretty. 
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Posted: 7/13/2018 6:00:35 PM EDT
[#6]
Quote HistoryQuoted:
I'm interested in the reasoning for the bolt catch though. I've pounded a bolt latch pin out. It's a pain. |
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Posted: 7/13/2018 6:05:56 PM EDT
[#7]
Buy these and a 6-32 tap. It is that easy to do at home and a lot of companies sell lowers already threaded.
Aero Threaded Bolt Catch Pin |
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Posted: 7/13/2018 6:28:13 PM EDT
[#8]
Maybe just me, but installing the roll pin into the bolt stop isn't that hard. Tape up the receiver and away you go. My first build the worst part was the trigger guard pin. I didn't prep anything, and thought for sure my gorilla swings were going to break the ear off. I've learned better since.
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Posted: 7/13/2018 7:24:35 PM EDT
[#9]
The only prep I do for bolt catch is to put down some duct tape on the receiver incase i do scratch it.
As far as the ears, its all about supporting the back side and I taper the pin a lil more and CLP it. been lucky and no busted ear, its good to see manufactors coming up with different approaches to this, like built in trigger guard, screw in guard, etc. |
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Posted: 7/13/2018 9:49:06 PM EDT
[#10]
Quote HistoryQuoted:
Buy these and a 6-32 tap. It is that easy to do at home and a lot of companies sell lowers already threaded. Aero Threaded Bolt Catch Pin |
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Posted: 7/13/2018 10:35:58 PM EDT
[#11]
Quote HistoryQuoted:
Makes sense. Have you done this? The take down pin hole seems easy, but I bet the bolt catch pin hole would be a challenge. My nagging suspicion is that if this were easy more people would have done it. Quote HistoryQuoted:
Quoted:
Being that the lower is alum, i guess you could force a steel set screw in there, but why not just do it right. A small tap doesnt cost that much, I got my set screws from the hobby store, buy a dozen for 1.00 or so and then youll have them. My nagging suspicion is that if this were easy more people would have done it. DRILL or REAM the hole for rear take down to .089, chamfer outside edge of hole, tap for 4-40 thread, use 4-40 set screw DRILL or REAM the bolt catch hole for bolt catch screw you buy (like using a 6-32 threaded DPMS ar10 bolt catch screw, drill using #35 or .107) Only drill/tap the one side of the bolt catch flange. You will need a drill extension and a tap extension long enough to have the amount of reach for the bolt catch. Tape or cover the side of the lower to protect it. _ |
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Posted: 7/14/2018 8:12:23 AM EDT
[#12]
Quote HistoryQuoted: I'm thinking about using a Catch-22 bolt latch for a dedicated 22lr lower, and it would be nice if this were reversible so if the latch is a disaster I can readily switch back. I've pounded a bolt latch pin out. It's a pain. |
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Posted: 7/15/2018 10:42:51 AM EDT
[#13]
Or, you could skip alkt of this and just buy a San Tan Tactical upper/lower receiver. Every place you wod install a roll pin is threaded for a threaded pin. Easiest set ive put together in my life. I did loctite the pins with some low strength threadlocker for my own anal retentive mindset though. Ive seen several other manufacturers do this and it sure seems like a good idea to me, if nothing else than the bolt release.
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Posted: 7/15/2018 10:40:04 PM EDT
[#14]
Quote HistoryQuoted:
Or, you could skip alkt of this and just buy a San Tan Tactical upper/lower receiver. Every place you wod install a roll pin is threaded for a threaded pin. Easiest set ive put together in my life. I did loctite the pins with some low strength threadlocker for my own anal retentive mindset though. Ive seen several other manufacturers do this and it sure seems like a good idea to me, if nothing else than the bolt release. |
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Posted: 7/19/2018 2:17:04 PM EDT
[#15]
A few years' back Aero sold some blems that had the wrong size hole in the trigger guard (they use the same drill for the trigger pins.) Their recommendation was to purchase an A4 tap and set screws. Worked like a charm, and I got two lowers with consecutive serial numbers out of the deal.
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