Frenchy Posted May 5, 2021 Report Share Posted May 5, 2021 I'm building a moderately lightweight ar308. I purchased a mil spec carbine length buffer tube from 2a and went heavy on the buffer itself with a carbine length 2-stage stealth buffer from Armaspec. I'm not comprehending why the buffer is almost 3/4" too short for the tube. Did I get a mislabeled part? What am I missing here? I feel like Armaspec and 2a will probably both say I need to contact the other guy. PS. I'm new to the forum and only have a couple of builds under my belt, so go easy on me please. Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted May 5, 2021 Report Share Posted May 5, 2021 Measurements are required Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted May 5, 2021 Report Share Posted May 5, 2021 First advice that comes to mind is return that stuff and buy the Armalite kit; https://www.armalite.com/SACItem.aspx?Item=AR10REKIT01&ReturnURL=/Armalite/Product-Category/AR10-Parts-Accessories/Lower-Receiver-Parts&Category=ac614400-ff09-4cdf-9d35-419a654e7201 Going to need the inside depth of the buffer tube. That captured spring stuff is a regular on build doesn't work thread parts lists here. Quote Link to comment Share on other sites More sharing options...
Frenchy Posted May 5, 2021 Author Report Share Posted May 5, 2021 (edited) 15 hours ago, edgecrusher said: Measurements are required The buffer tube is 7 25/32" internally, but the buffer turns out to be 7 3/32" so it's 11/16" more tube length or less buffer length than I need. I must've gone astray somewhere. Is there a difference in buffer systems between Armalite and DPMS? My build is DPMS. Questions I should've asked... Edited May 5, 2021 by Frenchy Incomplete information Quote Link to comment Share on other sites More sharing options...
shooterrex Posted May 5, 2021 Report Share Posted May 5, 2021 This will work. If the web says out of stock call them. https://www.armalite.com/SACItem.aspx?Item=AR10REKIT01 Quote Link to comment Share on other sites More sharing options...
Frenchy Posted May 5, 2021 Author Report Share Posted May 5, 2021 Thanks guys, I appreciate the assist! All the best to you! Can't wait to get more gun money from Biden. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 6, 2021 Report Share Posted May 6, 2021 9 hours ago, Frenchy said: The buffer tube is 7 25/32" internally, but the buffer turns out to be 7 3/32" The standard for the buffer should be 7 5/8" internal depth. You're close enough. That should run a buffer that's 3.250" long, and weigh 5.4 oz. There isn't a buffer for these things made that comes out to 7 3/32" long. Something wasn't measured right to come up with that number. Quote Link to comment Share on other sites More sharing options...
DNP Posted May 6, 2021 Report Share Posted May 6, 2021 Silent captured system, right? Designed for a shorter tube maybe? Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted May 6, 2021 Report Share Posted May 6, 2021 20 minutes ago, 98Z5V said: There isn't a REAL buffer for these things made that comes out to 7 3/32" long. Fixed it......He has one of those captured spring thingy-ma-bobs, https://www.at3tactical.com/products/armaspec-srs-stealth-recoil-spring-multiple-buffer-weights-available Quote Link to comment Share on other sites More sharing options...
DNP Posted May 6, 2021 Report Share Posted May 6, 2021 What’s the depth of an ar15 tube? Wrong part? Just guesses Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 6, 2021 Report Share Posted May 6, 2021 5 minutes ago, DNP said: What’s the depth of an ar15 tube? Wrong part? Just guesses Real Armalite number is 6 15/16" internal, common aftermarket that works is 7.000" internal. 7 minutes ago, jtallen83 said: Fixed it......He has one of those captured spring thingy-ma-bobs, https://www.at3tactical.com/products/armaspec-srs-stealth-recoil-spring-multiple-buffer-weights-available No way would I be running one of those things in a .308AR. Quote Link to comment Share on other sites More sharing options...
DNP Posted May 6, 2021 Report Share Posted May 6, 2021 7” sounds about right for that buffer. It ain’t for a 308. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted May 6, 2021 Report Share Posted May 6, 2021 8 hours ago, DNP said: It ain’t for a 308. But it says AR10? and it's "equivalent" to 5.7 ounces. Makes you question how much R&D was done when they can't even get the nomenclature right, not even a mention of what size carbine tube it fits, wonder if they even know there are different sizes? .308, 5.7oz Equivalent For AR10 Rifles in .308 WIN, 6.5 Creedmoor, 6mm Remington, 6mm Creedmoor Quote Link to comment Share on other sites More sharing options...
Madhouse Posted May 15, 2021 Report Share Posted May 15, 2021 I've moved your thread to the Member Builds forum. Quote Link to comment Share on other sites More sharing options...
Frenchy Posted May 15, 2021 Author Report Share Posted May 15, 2021 So as it turns out, the nice folks at Armaspec have a solution to the dilemma. Spacers! Oddly enough, I had done a search for spacers, assuming something would come up, but nothing did. When I was able to get in touch with an Armaspec rep, voila! $6.99 later, the problem is solved! I will be able to test this setup as soon as my charging handle arrives. 13 weeks so far... Quote Link to comment Share on other sites More sharing options...
DNP Posted May 15, 2021 Report Share Posted May 15, 2021 (edited) I put 2 quarters in mine. They only cost me $0.50. And I get my money back if I ever take them out. Edited May 15, 2021 by DNP Quote Link to comment Share on other sites More sharing options...
Frenchy Posted May 15, 2021 Author Report Share Posted May 15, 2021 14 minutes ago, DNP said: I put 2 quarters in mine. They only cost me $0.50. And I get my money back if I ever take them out. That's cheaper than a round of .308 ammo... I'll remember that for my next build. Quote Link to comment Share on other sites More sharing options...
DNP Posted May 15, 2021 Report Share Posted May 15, 2021 Learned that here. That was a 98 trick. Quote Link to comment Share on other sites More sharing options...
Frenchy Posted May 15, 2021 Author Report Share Posted May 15, 2021 2 minutes ago, DNP said: Learned that here. That was a 98 trick. You, Sir, are a veritable wealth of information. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 16, 2021 Report Share Posted May 16, 2021 Every quarter that you add gets you 0.069" of space-freedom. Stack 'em if you have to, make up whatever space you need to. In the old(er) days, it took $1.75 to make a pistol caliber carbine run with a regular AR15 buffer. . Quote Link to comment Share on other sites More sharing options...
Steve crawford Posted May 21, 2021 Report Share Posted May 21, 2021 (edited) I bought a lightly used DPMS LR-308 from a pawn shop. I took it over to a gun shop and had them put a RRA adjustable but stock on it. A few days later I found this site. Yesterday I was giving the rifle a good cleaning. I decided to weight the buffer. Guess what. I had a 3.0 oz. buffer that was 3.25 inches long. I did some looking around here and found this thread. I went to the Armalite site and found the carbine tube kit. It was cheaper to buy the kit than just the buffer and spring. This way I know that I have the correct tube, spring and buffer. I called there customer service and verified that they had it stock. Now to see how long it will take to get it shipped. 😁😁😁 Steve Edited May 21, 2021 by Steve crawford Quote Link to comment Share on other sites More sharing options...
unforgiven Posted May 21, 2021 Report Share Posted May 21, 2021 Smart 🤓 Quote Link to comment Share on other sites More sharing options...
Steve crawford Posted May 21, 2021 Report Share Posted May 21, 2021 Finally got the RRA Marksman but off the buffer tube. I just don't have the hand strength I need for this stuff. Removed the Buffer tube and with the cheap steel tape I have. The inside length is 6 15/16 inch. So I now have an extra buffer tube that is the correct length for the Armalite buffer. I need to get a good multi tool for the AR rifle. The one I have has some kind of crinkle coat finish on it and it makes it hard to keep in the castle nut to break it lose. 🥴🥴🥴 Steve Quote Link to comment Share on other sites More sharing options...
Frenchy Posted May 21, 2021 Author Report Share Posted May 21, 2021 You can never have too many extra parts. Quote Link to comment Share on other sites More sharing options...
shooterrex Posted May 21, 2021 Report Share Posted May 21, 2021 1 hour ago, Steve crawford said: Finally got the RRA Marksman but off the buffer tube. I just don't have the hand strength I need for this stuff. Removed the Buffer tube and with the cheap steel tape I have. The inside length is 6 15/16 inch. So I now have an extra buffer tube that is the correct length for the Armalite buffer. I need to get a good multi tool for the AR rifle. The one I have has some kind of crinkle coat finish on it and it makes it hard to keep in the castle nut to break it lose. 🥴🥴🥴 Steve If it was built properly the castle nut should have been staked. That makes getting it loose a challenge till you break it loose. Quote Link to comment Share on other sites More sharing options...
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