rain556 Posted January 24, 2015 Report Share Posted January 24, 2015 Im building my first 308. I bought a psa lower stripped and pws ebt tube and noticed that they make a 308 version. I was told I could use the tube I have. All I have to do is use a 308 carbine buffer and 308 spring. Is this right or do I need the longer 308 version. I purchased a PWS MK220 complete upper. What type of buffer should be .used and will it fully cycle with tube I already have..The tube I have is 7.8 inches and the 308 tube is 8.25 inches Quote Link to comment Share on other sites More sharing options...
blue109 Posted January 24, 2015 Report Share Posted January 24, 2015 I think the main issue you may have is the PWS upper working with the PSA lower. most of the guys in here who tried one found it is not compatible with standard DPMS uppers like it was advertised. on a standard DPMS pattern 308, a normal AR15 extension with a 308 specific buffer and spring is correct. I believe the inside depth of the tube should be 7"?can't say for sure if PWS or PSA use the same parts. Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted January 24, 2015 Report Share Posted January 24, 2015 (edited) Im building my first 308. I bought a psa lower stripped and pws ebt tube and noticed that they make a 308 version. I was told I could use the tube I have. All I have to do is use a 308 carbine buffer and 308 spring. Is this right or do I need the longer 308 version.Yes, with the LR-308 carbine spring and LR-308 carbine buffer your AR-15 PWS EBT will work. I also suggest grabbing a CAR-10 Heavy Buffer. I have a factory PWS MK216 and found that dropping in a heavier buffer smoothed things out.If you found this helpful and are going to order a heavy buffer, please use our Brownell's Affiliate Link (then search part 100-007-353WB) to support the site! Thanks!There have been some cases of PSA's .308 uppers not playing too nicely with other LR-308 lowers, but they may have finally ironed things out. Regardless, it's a good idea to double-check. Edited January 24, 2015 by FaRKle! Quote Link to comment Share on other sites More sharing options...
rain556 Posted January 24, 2015 Author Report Share Posted January 24, 2015 Thanks alot Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 17, 2015 Report Share Posted March 17, 2015 I just saw this today: http://www.thefirearmblog.com/blog/2015/03/16/leapers-introduces-6-position-308-ar-receiver-extension/ Is this essentially the same as these? http://www.midwayusa.com/product/1413511541/dpms-receiver-extension-buffer-tube-6-position-ar-15-lr-308-carbine-aluminum-matte http://www.brownells.com/rifle-parts/receiver-parts/buffer-tube-parts/buffer-tubes/308-ar-carbine-buffer-tube-assembly-prod44751.aspx http://www.pof-usa.com/shop/index.php?id_product=8&controller=product https://www.primaryarms.com/308_CAR_receiver_extension_8_collapsible_p/arm10207025.htm http://www.midwayusa.com/product/348370/vltor-a5-recoil-system-carbine-receiver-extension-buffer-tube-7-position-mil-spec-diameter-ar-15-aluminum-black Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted March 17, 2015 Report Share Posted March 17, 2015 I just saw this today: http://www.thefirearmblog.com/blog/2015/03/16/leapers-introduces-6-position-308-ar-receiver-extension/ Is this essentially the same as these? http://www.midwayusa.com/product/1413511541/dpms-receiver-extension-buffer-tube-6-position-ar-15-lr-308-carbine-aluminum-mattehttp://www.brownells.com/rifle-parts/receiver-parts/buffer-tube-parts/buffer-tubes/308-ar-carbine-buffer-tube-assembly-prod44751.aspxhttp://www.pof-usa.com/shop/index.php?id_product=8&controller=producthttps://www.primaryarms.com/308_CAR_receiver_extension_8_collapsible_p/arm10207025.htmhttp://www.midwayusa.com/product/348370/vltor-a5-recoil-system-carbine-receiver-extension-buffer-tube-7-position-mil-spec-diameter-ar-15-aluminum-blackThat RE looks AR-10 pattern to me. Notice how it has more space between the inner most position and the ramp compared with the AR-15 REs. Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 17, 2015 Report Share Posted March 17, 2015 Farkle, Not really sure what you mean. I guess what I'm getting at, is which ones of those can I use for a dpms pattern 308ar for use with an adjustable carbine stock? Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted March 17, 2015 Report Share Posted March 17, 2015 Farkle, Not really sure what you mean. I guess what I'm getting at, is which ones of those can I use for a dpms pattern 308ar for use with an adjustable carbine stock?AR-10 pattern carbine receiver extensions are different than LR-308 pattern ones. LR-308 pattern ones are the same as an AR-15 carbine receiver extension. AR-10 pattern receiver extensions are longer and are the same length as the VLTOR A5 receiver extension.If you have a LR-308 buffer setup (short buffer) then this UTG receiver extension probably won't work since it looks to be longer (AR-10 pattern).You can put an AR-10 pattern buffer system on a LR-308 pattern receiver set. Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 17, 2015 Report Share Posted March 17, 2015 I see. Which set up will work better with Sprinco or Slash's .308 carbine springs and an H3 buffer (meaning which extension tube)? - I'm looking to keep the rifle lighter, cheaper, and decrease recoil. Thanks Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted March 17, 2015 Report Share Posted March 17, 2015 I see. Which set up will work better with Sprinco or Slash's .308 carbine springs and an H3 buffer (meaning which extension tube)? - I'm looking to keep the rifle lighter, cheaper, and decrease recoil. ThanksWith the AR-15 H3 buffer you'll need AR-10 pattern parts. The UTG receiver extension looks like it'll work (and the VLTOR A5 one definitely will). You'll want an Armalite (Part # EA1095) action spring for this. Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 17, 2015 Report Share Posted March 17, 2015 Will Slash's or Springco's springs work? Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted March 17, 2015 Report Share Posted March 17, 2015 (edited) Will Slash's or Springco's springs work?Slash's spring is just the Armalite EA1095 spring. He cuts a few coils off of those for use in LR-308 pattern guns.If you really want to use Springco, use the red spring.AR-10 Carbines (E.G. Armalite, Noveske, LMT) using deeper extension tubes and standard length carbine buffers to accommodate the longer .308 BCG also use the "RED" Spring. Edited March 17, 2015 by FaRKle! Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 18, 2015 Report Share Posted March 18, 2015 (edited) So just to clarify, the following should work: Leapers-UTG Receiver Extension Tube AR10 H3 Carbine Buffer Armalite EA1095 Spring Edited March 18, 2015 by D.R.D. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 18, 2015 Report Share Posted March 18, 2015 Been watching this develop. Personal opinion, but I wouldn't count on anything from Leapers/UTG. Again, just my opinion. Spend your money how you want. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted March 18, 2015 Report Share Posted March 18, 2015 (edited) I was going ask a question & went to their sight & found the answer. Edited March 18, 2015 by survivalshop Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 18, 2015 Report Share Posted March 18, 2015 Good point. I'll check if it's milspec or not. 'Commercial' would be a deal breaker. What other options would I have besides Vltor. Just trying to save coin for the barrel. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 18, 2015 Report Share Posted March 18, 2015 Well, this is not really a "money-saving" platform. What other options besides VLTOR? Do you HAVE to use the AR15 buffer in your .308 AR? Use a DPMS LR308 Carbine buffer. You can find them cheap, at many sources. Put on several different brands of AR15 carbine receiver extensions. You have lots of choices - MANY. I think you're all wrapped around the axle about a specific setup. If you MUST use that setup, then I get it. If you don't know what your options are, then look around more. Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 18, 2015 Report Share Posted March 18, 2015 I see your point. I guess I want to reduce the recoil as much as I can, while still running a retractable stock. The H3 buffer weighs more than the DPMS LR308 buffer, but still costs a heck of a lot less than Slash's carbine buffer, that only weighs slightly more than the H3. Bang for buck, I suppose. Not a big deal at the end of the day. Thanks for the input all. Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted March 18, 2015 Report Share Posted March 18, 2015 Good point. I'll check if it's milspec or not. 'Commercial' would be a deal breaker. What other options would I have besides Vltor. Just trying to save coin for the barrel.POFBCM Intermediate Receiver ExtensionArmalite AR-10 carbine receiver extension Quote Link to comment Share on other sites More sharing options...
survivalshop Posted March 18, 2015 Report Share Posted March 18, 2015 (edited) Good point. I'll check if it's milspec or not. 'Commercial' would be a deal breaker. What other options would I have besides Vltor. Just trying to save coin for the barrel. I went to UTG sight & in their spec's it reads its a MilSpec Extension . I have used this one on the last couple of builds , very well made . .http://www.brownells.com/rifle-parts/receiver-parts/buffer-tube-parts/buffer-tubes/ar-15-m16-mil-spec-buffer-tube-prod27154.aspx Edited March 18, 2015 by survivalshop Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 23, 2015 Report Share Posted March 23, 2015 (edited) Not to make this more confusing.....but: Is this: http://bte-usa.com/parts/ar15-buffer-tube.html the same as this? (as far as measurements and functionality) http://www.thefirearmblog.com/blog/2015/03/16/leapers-introduces-6-position-308-ar-receiver-extension/ Edited March 23, 2015 by D.R.D. Quote Link to comment Share on other sites More sharing options...
FaRKle! Posted March 23, 2015 Report Share Posted March 23, 2015 Not to make this more confusing.....but: Is this: http://bte-usa.com/parts/ar15-buffer-tube.html the same as this? (as far as measurements and functionality) http://www.thefirearmblog.com/blog/2015/03/16/leapers-introduces-6-position-308-ar-receiver-extension/They look different to me. The BTE looks to be an AR-15 receiver extension and the UTG looks to be AR-10 pattern. Look at the space between the ramp and the 1st position. The UTG looks larger. Quote Link to comment Share on other sites More sharing options...
D.R.D. Posted March 23, 2015 Report Share Posted March 23, 2015 Got it. Thanks. I wasn't sure how to tell Quote Link to comment Share on other sites More sharing options...
blue109 Posted March 23, 2015 Report Share Posted March 23, 2015 description may say milspec. question is....is it milspec, or just milspec sized. if it's actually milspec, than id guess they probably buy them from the same people making a number of other home branded tubes. Quote Link to comment Share on other sites More sharing options...
shibiwan Posted March 23, 2015 Report Share Posted March 23, 2015 (edited) description may say milspec. question is....is it milspec, or just milspec sized. if it's actually milspec, than id guess they probably buy them from the same people making a number of other home branded tubes. I thought Leapers = Made in China. Don't quote me on that though. Edited March 23, 2015 by shibiwan Quote Link to comment Share on other sites More sharing options...
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