03-21-2014, 03:59 PM
I wouldn't attempt to disassemble the JP carrier & key unless you have a proper staking tool, torque wrench, drivers, new Grade 8 fasteners, acetone, Red Loc-tite, and detailed knowledge of how the carrier key to bolt carrier mating is supposed to work.
The most important things about the carrier key are:
* Solid gas seal with no chance of leaking (JP knows how to get this right. They are one of the few in the industry)
* Proper alignment of the carrier key with the gas tube (Most companies haven't a clue about what this really means in the AR, and don't really care.)
* Hard chrome lining of the carrier key. Most companies are oblivious to chrome-lined keys, and almost all are ignorant of the surface hardness the outside of the carrier key is supposed to be. I was ignorant of it until last year, and it's softer than I would have thought for a reason.
If you're going to do it right, you need specific tools for it, and need to be able to clean out the threads in the carrier for the fasteners, as well as fully degrease the carrier. It needs to be bone dry before installing the new carrier key, with new fasteners.
![[Image: p_080000638_1.jpg]](http://www.brownells.com/userdocs/products/p_080000638_1.jpg)
http://www.brownells.com/gunsmith-tools-...55683.aspx
The only reason I have a POF roller cam kit is because Frank was handing them out as promotionals at SHOT a few years ago. I installed it in a Young's MFG chromed bolt carrier for one of my retro projects that is meant to be a sleeper (1963 on the outside, 21st Century on the inside). I have yet to shoot it, as the build is years in the making, and not a top priority for me.
I do find it interesting that Colt had the roller cam on the AR10A, which was really Armalite and the Dutch's combined work on taking the AR10 to the next evolution for production.
The most important things about the carrier key are:
* Solid gas seal with no chance of leaking (JP knows how to get this right. They are one of the few in the industry)
* Proper alignment of the carrier key with the gas tube (Most companies haven't a clue about what this really means in the AR, and don't really care.)
* Hard chrome lining of the carrier key. Most companies are oblivious to chrome-lined keys, and almost all are ignorant of the surface hardness the outside of the carrier key is supposed to be. I was ignorant of it until last year, and it's softer than I would have thought for a reason.
If you're going to do it right, you need specific tools for it, and need to be able to clean out the threads in the carrier for the fasteners, as well as fully degrease the carrier. It needs to be bone dry before installing the new carrier key, with new fasteners.
http://www.brownells.com/gunsmith-tools-...55683.aspx
The only reason I have a POF roller cam kit is because Frank was handing them out as promotionals at SHOT a few years ago. I installed it in a Young's MFG chromed bolt carrier for one of my retro projects that is meant to be a sleeper (1963 on the outside, 21st Century on the inside). I have yet to shoot it, as the build is years in the making, and not a top priority for me.
I do find it interesting that Colt had the roller cam on the AR10A, which was really Armalite and the Dutch's combined work on taking the AR10 to the next evolution for production.