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Posted: 1/12/2014 12:07:16 AM EDT
| Read in another forum that it is recommended that you use a smaller than pin diameter drill bit for the first pass on the trigger, hammer, safety lever holes since the raised dimples can/will allow bits to slip out of the dimples causing misalignment of the pins. One reason I chose the James Madison Tactical 80% (Polymer 80) lower is the double sided jig that comes with the lower. This allows you to drill from both sides with the bit supported as it goes in. I have all of the parts for my build, and as soon as the drill press I ordered gets here I will do the "milling" and assembly, followed by a general review, and a range report. All will be in the update to my original thread on the JMT lower. 44-40pro |
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Quoted:
Read in another forum that it is recommended that you use a smaller than pin diameter drill bit for the first pass on the trigger, hammer, safety lever holes since the raised dimples can/will allow bits to slip out of the dimples causing misalignment of the pins. One reason I chose the James Madison Tactical 80% (Polymer 80) lower is the double sided jig that comes with the lower. This allows you to drill from both sides with the bit supported as it goes in. I have all of the parts for my build, and as soon as the drill press I ordered gets here I will do the "milling" and assembly, followed by a general review, and a range report. All will be in the update to my original thread on the JMT lower. 44-40pro Yeah, I've done a lot of research and video watching while waiting for it to arrive. The small pilot hole drilling technique seemed to have saved a lot of pain for most people. I'm going to go pick up a drill press as well for mine, but it will have to wait till next week. (Damn business trip getting in the way of my hobby and all) |
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Well fellas, I bought one of these on a whim, just to see how easy/hard it would be to make a functional AR. Took me about 1.5 hours with a dremel and a few hand tools, a drill, a stepper bit and some sand paper. Honestly these are easy to build, but don't know the longevity of the thing. I'm hoping for the best, and a standard LPK worked fine it in, but the trigger pin seems to want to move.
Get one, and see what you can make of it. The finish needs some better quality control, as there are smooth and rough places, but other than that, it seems pretty solid. I had to ream the detent holes and the roll pin hole for the BC release. I let the dremel slip and gouged one sport, but some bondo or JB weld should take care of that, and then some paint should fix it right up, and maybe even help with the weird uneven finish. YMMV |
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I've been running one for a couple of months, no problems. I am not crazy about the fit between the upper and lower, about .014 gap as compared to .005 with my factory gun. Gets a little smoky sometimes. I bought a blem so the finish is a little rough, but for $45 I can deal with it. Several hundred rounds so far. Definitely need to chase the spring holes before you assemble. |
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Quoted:
I've been running one for a couple of months, no problems. I am not crazy about the fit between the upper and lower, about .014 gap as compared to .005 with my factory gun. Gets a little smoky sometimes. I bought a blem so the finish is a little rough, but for $45 I can deal with it. Several hundred rounds so far. Definitely need to chase the spring holes before you assemble. I'm interested in getting one or two of these and try to get it finished put together. I'm glad it seems like they're durable. And for the gaps and finish, if nothing else, you could always Bondo, sand, and spray paint it 
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