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Posted: 9/4/2010 4:39:09 PM EDT
[#1]
The RRA LPK uses coiled roll pins and they are easier to install. It is an excelent quality LPK also
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Posted: 9/4/2010 5:15:51 PM EDT
[#2]
The CMT (stag) LPKs I have used came with roll pins. I used a couple from CMMG that had the split pins. I don`t know who they get their parts from. Do yourself a big favor and get one with the roll pins, in my experience they are a dream to get in compared to the split pins.
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Posted: 9/4/2010 5:23:07 PM EDT
[#3]
Armalite also sells LPK's with spiral pins. I have used multiple LPK's from both and I prefer the Armalite over RRA for 3 reasons.
1. Armalite uses a different style bolt catch which also has a square back (not beveled as is the case with most LPK's) and the front of it is all on the same plane. 2. Armalite packs their kits in a sealed plastic container which has a security sticker on it (no one can sell you a mystery LPK from Armalite on the EE or elsewhere). 3. Armalite has EXCELLENT customer service. I have had 2 issues with parts and they sent out free replacements the moment I called.  
ETA: Not that anyone is going to spend $200 on a Colt LPK or that it really matters... but Colt uses the "slotted" style roll pin. The only benefit I have found in using the spiral rollpins is that they are twice as easy to install on a build. |
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Posted: 9/4/2010 5:51:43 PM EDT
[#4]
Funny you should mention the Armalite, it's between them and DD that I'm looking at.
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Posted: 9/4/2010 6:04:45 PM EDT
[#5]
The only benefit I have found in using the spiral rollpins is that they are twice as easy to install on a build. Only??? 
To me that is plenty of reason to require them. But then again we'd miss out on all the nifty, "What do I do? I broke off a trigger pin ear." threads. 
I've never had that issue myself but there are plenty here who have. |
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Posted: 9/4/2010 7:30:56 PM EDT
[#6]
You should always use a piece of wood to support the ears at the very least.. I have only built 3 Ar,s but just to break one is more than the cost of the brownells plastic support puck.... Now your going to have to get it TIG welded and sand and refinish.......
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Posted: 9/4/2010 7:36:27 PM EDT
[#7]
Quoted:
You should always use a piece of wood to support the ears at the very least.. I have only built 3 Ar,s but just to break one is more than the cost of the brownells plastic support puck.... Now your going to have to get it TIG welded and sand and refinish....... WTF is a "Trigger pin ear"? |
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Posted: 9/4/2010 7:38:45 PM EDT
[#8]
How can you tell the diff between pins? I don't think I've ever seen a spiral pin.
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Posted: 9/4/2010 7:43:06 PM EDT
[#9]
A standard roll pin just has two ends that roll over and butt together. A spiral roll pin is just what it sounds like, it's rolled up, like you would roll up a newspaper.
RRA is the only LPK that I've used that came with spiral roll pins. Went together WAY easier than standard roll pins. Still, not worth the extra $25ish per kit, IMHO. |
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Posted: 9/4/2010 8:00:15 PM EDT
[#10]
Quoted:
How can you tell the diff between pins? I don't think I've ever seen a spiral pin. 
Spiral roll-pins are much stronger than the "spring" type roll-pins. And all Cub Cadet driveshafts require the spiral roll-pins.
http://gardentractorpullingtips.com/clutch.htm |
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Posted: 9/4/2010 9:02:49 PM EDT
[#11]
Quoted: Now your going to have to get it TIG welded and sand and refinish.......
and that will cost you more then replacing it. never knew about the spiral pins. My Armalite rifle came with sloted roll pins. |
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Posted: 9/4/2010 9:24:54 PM EDT
[#12]
Aaahhh. Cool. Now I get it. Thanks guys.
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Posted: 9/5/2010 6:23:07 AM EDT
[#13]
I've been assembling my DD LPK (slotted pins), and hit a big stop trying to get the $%@#* trigger guard pin.
I buggered it up pretty good (fortunately not damaging the receiver), so I removed it and ordered a new coiled pin from RRA. It was $1.33 shipped. William |
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Posted: 9/5/2010 8:00:08 AM EDT
[#14]
Quoted:
I've been assembling my DD LPK (slotted pins), and hit a big stop trying to get the $%@#* trigger guard pin. I buggered it up pretty good (fortunately not damaging the receiver), so I removed it and ordered a new coiled pin from RRA. It was $1.33 shipped. William IN the future you might have more success lubing it up and using vice grips with tape wrapped around the ends.. There is a tutorial posted here on the topic. It is much easier and more foolproof than hammering them in. |
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Posted: 9/5/2010 8:05:00 AM EDT
[#15]
I've had to crush the slotted pins a few times with a pliers or vice to get them to work. If it doesn't go in don't keep pounding, you need to fix the problem
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Posted: 9/5/2010 8:49:47 AM EDT
[#16]
Well, it looks like only RRA uses Spiral (roll, coiled and a million other names) pins.
Colt, CMT, Stag, CMMG use Slotted (split, channel, and the other million) pins Armalite can go either way. One said spiral, one said slotted. I sent Armalite a email last night to ask about what type is in their LPK. We'll see. |
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Posted: 9/5/2010 10:07:32 AM EDT
[#17]
Quoted:IN the future you might have more success lubing it up and using vice grips with tape wrapped around the ends.. There is a tutorial posted here on the topic. It is much easier and more foolproof than hammering them in.
That is my plan. Despite reading the "lower building" thread 20 times, I missed the notes about lubing the pin and crimping it a little smaller. My fault for not having a frame of reference on how hard the pin should be to install. The good news is that the bolt release pin went in like a dream. In any case, I'm sure the coiled pins will be much easier to press in (which is a VERY good way to do it). |
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Posted: 9/5/2010 12:17:30 PM EDT
[#18]
Quoted:
Quoted:IN the future you might have more success lubing it up and using vice grips with tape wrapped around the ends.. There is a tutorial posted here on the topic. It is much easier and more foolproof than hammering them in.
That is my plan. Despite reading the "lower building" thread 20 times, I missed the notes about lubing the pin and crimping it a little smaller. My fault for not having a frame of reference on how hard the pin should be to install. The good news is that the bolt release pin went in like a dream. In any case, I'm sure the coiled pins will be much easier to press in (which is a VERY good way to do it). If you use the vice grip method just make sure you have the trigger guard in place before you start clamping the pin in. 
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Posted: 9/8/2010 3:48:22 PM EDT
[#19]
I have just crimped the DPMS roll pins a little with channel locks and tapped them in with light weight oil, no problem in the last 5 builds with CMMG/DPMS LPKs.
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Posted: 9/8/2010 7:26:11 PM EDT
[#20]
I got slot pins in the DPMS/Stag kit I ordered, and used the vice grip method. It went quick and easy, and I didn't feel like I was tempting fate.
There is a difference in longevity, the roll split pins are thicker and suffer from rust less. The spring roll pins will flake layers off until they are unserviceable. The thin layers hold moisture and that promotes corrosion. Keeping them oiled is more important to prevent it. It's not likely something any of us would see in ten years, but something I have seen working on older cars 25 years+. Of course, they get left out in the rain and snow all winter. AR's not so much. There's the next Tier One premium product, stainless spring roll pins for just $39.95! |
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Posted: 9/9/2010 8:07:13 AM EDT
[#21]
Armalite did write me back. Their bolt release and trigger guard pins are spiral type. I decided to go with the Armalite kit. The bolt release and roll pins made up my mind. I really don't doubt that any LPK will work fine and I wouldn't notice any difference between all of them. Armalite just just has a couple extra bene's that the others don't have
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Posted: 9/9/2010 10:53:26 AM EDT
[#22]
Must be a new thing from RRA, cause all the LPK I have bought are from RRA & have never seen the coil pins, they've all been the standard roll pins. The coil pins would not be good for the rifles I build anyway.
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