Posted: 5/20/2010 8:41:55 PM EDT
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I am looking for some information that will help me figure out what I am doing wrong. Other than the answer - always go for Rock River for uppers and lowers :)
I have a factory build RR lower and I was trying to swap out my RR upper with another mfgs upper while I wait on the parts kit to finish up the stripped lower. The RR upper has no issues attaching the the RR lower - but the other mfg will not close close up. I tried removing the buffer tube & carrier bolt and still have the same issues. I figured as long as it was not Colt and the AR-15 pins are same style it should be a "no brainer".... I only have one completed lower, and a few other stripped receivers so I can't try a swap until my budget recovers from the reloading equipment & supplies I bought so I can play with my RR AR-15 without wincing too much when I pull the trigger. I have a RR stripped lower that I was planning on building into a dedicated 22 lr plinker. So do I have to worry about tweaking my receiver to make sure I get a good fit? Brad |
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Not closed up - the first pin fits fine - with the bolt and buffer tube removed I can close the rifle 95% up but can not engage the second pin.
With the bolt & buffer tube installed I think I can get around 90% closed before bottoming out. With both pins out I can drop the upper to the lower - but I did not think to try and push the pins in. Too late tonight for me to try that. I need to charge up the battery on my old camera and do it in daylight - otherwise the photo's are just nasty. Not quite sure what "high shelf" setup is. I am still too much of a n00b on this platform. [added - googled the term - AR-15 semi - vs M-16 automatic setup ] I have contact the other mfg to try to figure out what's up. Without a 3rd lower setup for me it's going to be hard to figure out what's up. I am just trying to get a clue on the other end of the deal. There is a nice new evil black rifle store in town that might be able for me to check that other mfg upper with a non RR lower. I tried to get them to price out what it would cost to assemble my other lower receivers but they said bring in the parts during a dead part of the week and they would help me put it together myself. I have the tools on back order to do it myself - but I just what to figure out what the source of the problem. It just might mean that RR lowers like RR uppers and the same with the other company. Tho it is not un-heard of to have issues in mfg - I did have to return two other non AR-15 receivers a few weeks back due to the pin locations being out of tolerances. I am planning a 4 rifle set - longer range range light bullet setup designed to work with 40 - 45 grain bullets. Medium -longer range heavy - which is what my Rock River is setup for Stripped lighter weight setup with heavy bullet 1 in 7 or 1 in 8. The forth - maybe as a spare parts gun - to accept the older parts that I have upgraded from the first 3 weapons. This will be my second RR setup, and will be based on a stripped RR receiver I picked up a year ago. Brad |
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Quoted:
This may be obvious, but if the bolt is in the upper, then cock the hammer and try it. Many times it seems like it will not fit and it's just the hammer in the way of the bolt. Never mind, I read you tried this already Thanks - that is something to remember to do from now on - might as well use it as standard practice to cock the hammer to keep it out of the way. [Updated] When I made sure the hammer was cocked, I was able to get real close into getting the back pin in....so it was worth try. Brad |
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Quoted:
Try doing it the opposite way. That is, mate the two halves together and push in the rear pin first, then push the front pin in. Do you have a small plastic faced hammer to tap the pins in? Post pics. No joy here - with the hammer cocked, I tried that method and the rear pin would not make it all of the way thru. The UPS truck came and left today - no missing parts / tools I need to try and rebuild that other lower. Unless I throw money at it and try a 3rd manufacture for receivers I am just going to sit on my thumbs and keep them warm. |
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Quoted: Quoted: Try doing it the opposite way. That is, mate the two halves together and push in the rear pin first, then push the front pin in. Do you have a small plastic faced hammer to tap the pins in? Post pics. No joy here - with the hammer cocked, I tried that method and the rear pin would not make it all of the way thru. The UPS truck came and left today - no missing parts / tools I need to try and rebuild that other lower. Unless I throw money at it and try a 3rd manufacture for receivers I am just going to sit on my thumbs and keep them warm. Did you use your plastic faced hammer to tap the pins in? High shelf lower means that there is a shelf at the rear of the trigger housing that prevents the installation of an auto sear. Post pics of what you are trying to do. |
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Quoted:
Quoted:
Quoted:
Try doing it the opposite way. That is, mate the two halves together and push in the rear pin first, then push the front pin in. Do you have a small plastic faced hammer to tap the pins in? Post pics. No joy here - with the hammer cocked, I tried that method and the rear pin would not make it all of the way thru. The UPS truck came and left today - no missing parts / tools I need to try and rebuild that other lower. Unless I throw money at it and try a 3rd manufacture for receivers I am just going to sit on my thumbs and keep them warm. Did you use your plastic faced hammer to tap the pins in? High shelf lower means that there is a shelf at the rear of the trigger housing that prevents the installation of an auto sear. Post pics of what you are trying to do. Not sure if pic's will help - - all I am trying to do is use a RR bottom with another mfg upper. The front pin connects and there seems to be a clearance issue with the back lug. My RR upper and lower assembles quite easily... so I am not going to screw up that setup by taking a dremel to anything that works. When I tried to engage the rear pin first I was only able to get it about 2/3 thru with the other mfg upper. I did lightly tap on it with a soft hammer - but no luck. The front pin did not even get close to start. I am stuck until I 1) find someone else in the local area that does not have a Rock River lower to play a game of swap. 2) Receive the remaining few items to finish up my other lower and check. I have one additional stripped RR receiver, but I was going to buy a XXXXX's lower receiver parts group to get it setup the way I like it. 3) Buy a completed lower - "cheap" from a different company in town. (So far the only thing I seen in town has been RR and LMT lowers for sale.) The RR is not cheap but affordable. The LMT while nice - is not in my budge to just have the hardware laying around. Now if I found something in Ion Bond / DLC - I would have reconsidered my buying choice. Brad - waiting for the other Black Rifle store to open today. |