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Posted: 3/1/2015 7:16:03 PM EDT
Hey everyone,
I'm working on 2 seekins billet builds together and both have a very hard time getting the rear take down pin to go in. I have tried swapping the upper to lower combinations and still the pin needs serious force to get it to go in. I have not been able to get either of the 2 builds, rear pin in. I did try using a brass bore cleaner to remove the coating on the holes of the upper receiver but no real improvement. Anyone come across this issue before. I know I want a tight fit but I would like to be able to remove the BCG for cleaning.... |
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I'm experiencing the same thing right now on a Colt build. Different pins work slightly better but its still real tight. Shoot it a couple hundred rounds see if it loosens up. -W
ETA: I see you are unable to get the rear pin in, and can't shoot it. Something is out of spec there. Can you check with a known good sized upper or lower? That would be my suggestion. -W |
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I can try and measure inside diameter of the holes if a good upper.
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I had really tight pin holes in a lower I was assembling(the pins measured spot on). I used a drill bit, the shank end, that was just undersized and wrapped it with some 1000 grit paper so it was a tight fit and hand polished the holes. Worked out very well for me.
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I was thinking about some polishing, but I don't really have the tools. I don't want to alter the .250 take down pin holes on a $400.00 Colt lower. I'd sure like to make these titanium take down and pivot pins work as well or better than the standard Colt parkerized ones. They are lighter, stronger, match the stainless pins that come with a Colt match trigger group pins and match the stainless trigger guard pin. They just don't fit the receivers well. I'm going to shoot a couple hundred rounds through mine, even if I have to use a punch to get it apart to clean it. I'm hoping it will loosen up just a little. -W
ETA: While I was happy to find SOMETHING that matched the other swirl polished stainless pins, I am more concerned with function than appearance. If these pins don't loosen up in one range trip, they are out of here. -W |
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I'd just clamp them together in my vise and run a .2505 reamer through the hole, but I understand that not everyone has a large machine vise and box full of precision reamers, so if I am to help you, I need to better understand your capabilities. What sort of equipment and skills do you possess?
$400.00 Colt lower View Quote |
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Six,
$400.00 was a bargain! Skills? I have some skills brother. Do I need to say it? I do have a valid CA Engineering license. Does that work for you? -W ETA: I'm also a CA licensed C-36 Plumbing Contractor, B-1 General Contractor, C-16 Fire Protection Contractor, Certified Brazier, Certified Med-Gas installer, and Certified Plumbing Inspector. Do you want some more credentials? -W |
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Quoted:
Did you polish the holes on the upper or lower.? View Quote If you're talking to me...I only did the lower receiver holes. The uppers were good. I left it tight and did not even cut through the anodizing. When I began the assembly I could not get the pins in the lower unless I would have used a hammer to press them in. Also, whatever you do leave them on the tight press fit side. They will work themselves in over time. |
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I have some skills brother. Do I need to say it? I do have a valid CA Engineering license. Does that work for you? -W
ETA: I'm also a CA licensed C-36 Plumbing Contractor, B-1 General Contractor, C-16 Fire Protection Contractor, Certified Brazier, Certified Med-Gas installer, and Certified Plumbing Inspector. Do you want some more credentials? -W View Quote Don't be snarky. I wasn't asking you anyway. |
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I'm pretty handy . I have access to numbered drills. Drill press. Have not gone too far outside of ar platform as far as gunsmithing goes. Have completed a handful of other ar builds just didn't want to force the rear pin in until I asked first. It would definitely need to be taken out with a punch if I can get it in. All I have done so far is to take the coating off of the holes in the upper with a brass bore cleaning brush.
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If you weren't asking me why did you quote me in your post Einstein?
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If you weren't asking me why did you quote me in your post Einstein? View Quote Nearly 1,200 posts here and you haven't figured out that if the first part of a post doesn't contain a quote or ^^^^^^^ before the response, then it's directed at the OP? If I was asking about your skills, I would have started that post with a quote from your post, or said "Wools10-" |
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okay, no problem. I'm just trying to help other amateurs like me to get builds done safely. We cant all be professionals like you. Later days dude. -W
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I'm pretty handy . I have access to numbered drills. Drill press. Have not gone too far outside of ar platform as far as gunsmithing goes. Have completed a handful of other ar builds just didn't want to force the rear pin in until I asked first. It would definitely need to be taken out with a punch if I can get it in. All I have done so far is to take the coating off of the holes in the upper with a brass bore cleaning brush. View Quote Doing it with twist drills and a drill press is a little sketchy, probably leave an ugly hole at best. I'd suggest a hand reamer: http://www.ebay.com/itm/1-4-HSS-Straight-Flute-Hand-Expansion-Reamers-/261296870996?pt=LH_DefaultDomain_0&hash=item3cd681d654 You will need a tap wrench to drive it if you do not have one already. |
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[b]Originally Posted By
Nearly 1,200 posts here and you haven't figured out that if the first part of a post doesn't contain a quote or ^^^^^^^ before the response, then it's directed at the OP? If I was asking about your skills, I would have started that post with a quote from your post, or said "Wools10-" View Quote I'm no machinist but I have built successful builds. This is just stumping me a little. I have resources to get tools needed or equipment . Just hoping for some hints and tips . Thanks |
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Quoted:
Doing it with twist drills and a drill press is a little sketchy, probably leave an ugly hole at best. I'd suggest a hand reamer: http://www.ebay.com/itm/1-4-HSS-Straight-Flute-Hand-Expansion-Reamers-/261296870996?pt=LH_DefaultDomain_0&hash=item3cd681d654 You will need a tap wrench to drive it if you do not have one already. View Quote View All Quotes View All Quotes Quoted:
I'm pretty handy . I have access to numbered drills. Drill press. Have not gone too far outside of ar platform as far as gunsmithing goes. Have completed a handful of other ar builds just didn't want to force the rear pin in until I asked first. It would definitely need to be taken out with a punch if I can get it in. All I have done so far is to take the coating off of the holes in the upper with a brass bore cleaning brush. Doing it with twist drills and a drill press is a little sketchy, probably leave an ugly hole at best. I'd suggest a hand reamer: http://www.ebay.com/itm/1-4-HSS-Straight-Flute-Hand-Expansion-Reamers-/261296870996?pt=LH_DefaultDomain_0&hash=item3cd681d654 You will need a tap wrench to drive it if you do not have one already. Is a tap wrench the same as the square drive that you would use on thread cutting taps ? |
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We cant all be professionals like you View Quote Before you try to insult someone by alluding that they do not actually possess the skills they claim to, you should be certain that they really don't possess those skills. I have no idea why your are so defensive; even if I had asked you, it's not like I was insulting about it. It was a very simple and straight forward question. Are you feeling inadequate in some regard? That's really the only explanation that makes sense (and no, that question is not phallic in nature) |
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Quoted:
Listen you kind of came in to this thread and have shit in it(a little). This area is for serious questions and not for smart remarks. Please let people help the OP. View Quote View All Quotes View All Quotes Quoted:
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If you weren't asking me why did you quote me in your post Einstein? Listen you kind of came in to this thread and have shit in it(a little). This area is for serious questions and not for smart remarks. Please let people help the OP. Thanks ^^^ I'm not trying to cause a rukas I'm just looking to you guys for help. |
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Is a tap wrench the same as the square drive that you would use on thread cutting taps ? View Quote Yeah. Using a hand reamer and being careful to maintain alignment, you should be able to get those holes aligned and sized within .001" fairly easily and quickly. |
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You all can get fucked. I have 30 years experience building ar-15's every model you could name, I wont help another person. Get fucked im gone. - View Quote Oh, whatever will arfcom do without members who have shitty attitudes, derail threads and contribute absolutely no useful information for the OP? (And if you really have 3 decades "building" ARs, that makes you at least 45-50 years old. I'd say you're a little immature.) BTW, I have actually built an AR. And I don't mean assembled from finished or nearly finished parts. |
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Quoted:
Yeah. Using a hand reamer and being careful to maintain alignment, you should be able to get those holes aligned and sized within .001" fairly easily and quickly. View Quote View All Quotes View All Quotes Quoted:
Is a tap wrench the same as the square drive that you would use on thread cutting taps ? Yeah. Using a hand reamer and being careful to maintain alignment, you should be able to get those holes aligned and sized within .001" fairly easily and quickly. I looked at the ebay link. What makes it a hand expansion reamer? Or is that just a term of making a hole larger manually? Also what is the threaded portion of the reamer a the front ? |
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What makes it a hand expansion reamer? Or is that just a term of making a hole larger manually? Also what is the threaded portion of the reamer a the front ? View Quote Expansion reamers can be expanded and resharpened as they wear. This is not the same as adjustable reamers, which can be increased and decreased in size. The threads would be to expand it before resharpening. A solid reamer would work fine for your purposes, too, but that expansion reamer is a great price, and the pilot will help you get it started straight. Real easy to get caddy wampus with a reamer that has no pilot if you do not have the equipment to align it properly before entering the hole. |
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Big fucking deal so does blackthorn and Vulcan jackass. LMAO View Quote Actually, they source a lot of their parts. I'm talking about actually machining everything from solid stock. ETA: You're the new NOVESKE LMMFAO View Quote Never claimed to be, don't aspire to be. Building the same thing over and over bores me. That's why I bounce between guns, miniature engines, RC car parts, etc., when I'm not busy doing paying machine jobs or running my primary business. |
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Quoted:
Listen partner, I will shoot your lights out with this build I made in 2007. You name it. The time and the place. (as long as its within 50 miles of me) And I'll out shoot you all day. You take on this 53 year old man. I'll shoot dead eye all day boy. LOL Lets rock. -W http://i461.photobucket.com/albums/qq335/ipipe4u/FDEAR-15_zpscfe5e42a.jpg View Quote He does have a nice gun bench. |
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Thank you. Much Appreciated.
ETA: That build is history. Last year some time. Another Colt :) -W |
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OP, I apologize, but I just can't resist indulging this a little more...
Listen partner,
I will shoot your lights out with this build I made in 2007. You name it. The time and the place. (as long as its within 50 miles of me) And I'll out shoot you all day. You take on this 53 year old man. I'll shoot dead eye all day boy. LOL Lets rock. -W View Quote LMAO. That ugly, heavy piece of shit would feel like a boat anchor in 3-gun or carbine courses, and I seriously doubt you could keep up with a 33 year old in excellent physical shape with 20/12 vision in such challenges. It also wouldn't hold a candle to my 22" Wilson bull barrel rifle shooting tailored 75 gr match hand loads at 600. I like your 50 mile qualifier, too. None of my rifles are even legal in your commie state. If you're ever here, though, I'll take that challenge. I'll even handicap myself by running a .308 AR. |
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Dude, you're a fucking joke. I gave that rifle to my Son although I shoot it and well and have access to it at any time, My Son is 6'-8" tall and 275 pounds. You think that rifle is heavy? It looks small in his hands. LMMFAO I thought you could shoot something "YOU BUILT" Dude, youre a joke. -W out.
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