Jgun

I forgot to add these pics.

Picked this up from My dealer tonight. Looks like a real nice piece. The upper/lower fit is the best I've felt. It seems pretty light, in fact thats what led me to go with this one. When I spoke to Greg at Kaiser he told me that if I used light weight components, I could build a .308 that approached the weight of an AR-15. I'll have to prove that claim for myself.

I have a matched upper/lower set coming from Kaiser Military Technologies. Looks like I may be building two .308's at the same time. I'm thinking about putting the DPMS upper on the Bridgeport and trying to make it match the POF lower better. If I'm happy with the results I'll use it to build one gun and the Kaiser set to build another.

Don't know if this is the right area to ask this question, but I was wondering if anyone could give any first hand information on the carbon wrapped barrels. I see ABS and Christensen listed as two manufacturers. I see that they claim to give match grade accuracy and extended barrel life , not to mention shaving pounds off the front of the gun. I was wondering if anyone is aware of any negetive aspects of these barrels aside from the extremely high price?

So now I'm exploring my options for a matched upper/lower receiver set to build on. Based on what I see on this forum, I see that the sets from Iron Ridge , JD Tech and Kaiser would all be options. I have some reservations about the Iron Ridge because of the 23 MOA angle built into the top rail. I don't expect to be shooting this gun at extremely long range, simply because no suitable ranges are available in my area. The JD Tech looks like a good part and I might go with it.The other choice is the Kaiser receiver set. Has anyone had any experience with the Kaiser rifles or receivers? Any information or advice is appreciated. I'd like to get it right this time.

Your upper looks a lot better along that back edge. Much smoother, without the gouges on both sides like mine. Trust me it doesn't look nearly as bad in the pictures as it does when you actually handle the gun. I realize that it will have no functional effect on the guns performance but I'm going to be sinking a lot of money (for me) into this build and I'm not sure I'll be happy with it like this. I'm thinking about buying a matched upper/lower set from Iron Ridge. I see something on the top of their upper where it says 23 MOA Is that a negative angle built into the top of the rail for shooting long distances? If so will that give me any trouble shooting close up off hand? I plan to build the gun with a 18.5" barrel and don't expect to be shooting beyond 300 YDS very often. My local range is only 200yds.

This is what the DPMS upper looks like on the POF lower. I didn't expect it to fit perfectly but I'm disappointed in the machine work on the back edge of the DPMS upper. I've enclosed close ups of the left and right side back edge of the upper. I was wondering if anyone can tell me, is this the way all the DPMS uppers look in the back? I've doon some machine work and I can't imagine that they would not finish this area mre uniformly. I'm going to go ahead with the build with these parts for the time being but if finances allow I may opt for a matched upper/lower set after I test it out.

Bandit 10-4 I sent you a money order a couple of days ago for the .308 trigger and sent you an email to that effect. Since that time I have been told that the POF .308 lower I'm going to use actually takes an AR-15 trigger and not the .308 trigger. I haven't contacted POF to verify that yet but maybe one of the members can tell me if that is correct. If so, are you able to sell me an AR-15 trigger instead of the .308?

I ordered a DPMS upper to go on the POF lower. Hope it looks OK. I'll post pics when it gets here.

Bandit10-4 Do you still have one of the 308 triggers? If so I'd like to buy one. Please let me know.

Survivalshop, that would be a big help. I'm disappointed that it doebn't appear as though the SI will work, it looked like a real nice part. The two places I'm concerned about on yhe DPMS are in the back .500" behind the center of the takedown pin. this is the area where the SI upper was 1.085" The POF steps out sharply from the.905" in the trigger area to 1.145" at this point. I'm hoping that the DPMS is a little wider than the SI at this point. The other place that I would ask you to measure is in the mag well area on the left side. If you could give me a measurement from the left side of the front pivot pin lug to the out side surface of the upper I should be able to tell if it will match up or at least overhang. The POF measures .285" in this location. When I get a chance I'll post some pics. In the mean time I want to thank you for your help.

Suvivorshop thanks for the measurements. based on them I'm not so sure any more it will work as well as I had hoped. The POF lower measures .905" in the area above the selector switch. Basically it doesn't have the lip at the top like most of the other lowers do. This wouldn't be a problem because I expected that any upper I use will overhang the lower in that area. The problem that I see is that at the back, behind the takedown pin area where the back of the upper starts to curve upwards, the POF lower is actually wider than the SI Defense upper by about .o65". Although this isn't much, I'm not so sure I'll be happy with the upper going from overhanging to being recessed at that spot. In fact there's a sharp edge right there that might be a problem. I guess I'm going to have to keep looking. So far the DPMS seems to be the most likely choice. I'll post pics once I have the upper and lower mated. Thanks for your help.

Survivalshop, I spoke to Dan Clark over there and he said basically the same thing as you. He said the Gen II and Gen III were designed because the original upper took too long to manufacture. He told me that the machine time on the original style fluted upper is double the new style and that they probably will stop offering it. He told me that they've had no experience with mating one of their uppers to a POF lower, and asked me to let them know how it works out should I decide to use their upper. I was wondering, do you think you could possibly give me some measurements taken from your upper? I'm trying to figure out how it will fit on the POF. I think it should probably fit physically and functionally on the lower, but I'm trying to figure out how much it will hang over the top of the lower in the back trigger area and I'm hoping that it will fit closely on the left side in the magwell area. It looks as though the POF is going to stick out further on the right side in the magwell area(in front of the mag release) but I don't think that would be a deal breaker.

I thought I might try it in heavy metal division at my local matches. I wonder if those guys use them? Come to think of it the JP 308 AR's don't have forward assist's, do they?

Survivalshop, I took a look at the si-defense link you listed and their uppers look pretty good also. I see that they list a Gen II and Gen III for $210- $250 while the first one listed (Gen I ?) is listed for $475. Any idea what's so special about that one that warrants double the price of the others?

I'm thinking about giving the Guys at Iron Ridge a call. It looks like a real nice part. If it fits the POF OK I think it would be a good foundation. Something I noticed, It seems as though the forward assist is not as widely used on the 308 platform rifles as on the 15's. Any one think useing an upper without the forward assist would be a mistake? I see that some of the high end 308 AR's recently released don't have them. Come to think of it, I don't believe I've ever used one in all my admittedly limited experience with AR's Thanks for the warning about the rail height of the new DPMS uppers. Just what I'd need would be to buy one on GB and find out it was taller than the rail(I don't plan to use a DPMS rail.

I think I'm going to pick up a DPMS upper and see how well they fit together. Then I'll decide from there. I really like the Iron Ridge upper/lower sets but since I already have the POF I'd have to sell that first if I wanted to go with the other. I'll post pics if I end up using the POF/DPMS setup.

Thanks, I doesn't look like the fit is too bad. It's a little hard to visualize what the gun would look like if it was all black. Have you heard anything about function problems with this setup? I like the idea of being able to use the P mags and I also like the idea of being able to choose my rail length/conf. from DD of SWS.

I'm about to start building my first .308 AR. I decided to build one last year and without any research into component compatability I picked up a POF lower. After buying the lower I got side tracked by an AR-15 build(my first). Now I'd like to get back to the .308 build. When I picked up the POF lower I thought that the upper/lower compatability of the .308 platform guns was the same as it is for the 5.56 guns. Now that I have a little more knowledge I find that's not the case. So here's my questions, I really think that the POF lower is a quality part but want to build my own gun without their rail, and not a piston gun. I've been told that the only upper that I can use is the DPMS, and that I have to use bushings in the pivot and takedown pin holes of the upper. Can anyone tell me if that's true? If so, how well do the DPMS upper/POF lower fit? Has anyone put one of these together? If so, would you advise me to start from scratch with a matched upper/lower set? Are there any other problems associated with a build using these parts as the foundation? I'm also assuming that the only BCG that I'll be able to use is the DPMS, Is that correct? Any help or advice that can be offered would be appreciated.