78transamlvr Posted July 13, 2014 Report Share Posted July 13, 2014 It sarted off as a basic lr308 from silver bullet gun works dpms carbine gas system: upper/lower/barrel/bcg/hammer and that is were it stops! Installed: Magpul prs stock with red color fill/punisher skull-5.5oz carbine buffer-full lenght A2 tube and spring-ergo rear grip-slim contour rail-low pro gas block-extended charging handle and ext take downs- .154"anti walk pins with e-clips-armspec tcb-FN trigger and springs-stainless steel firing pin-phase 5 EBRv2 bad lever/new holdback screw-magpul rail sling apdt with red color fill-magpul mbus gen 2 flip ups with red color fill-Harris bi pod and rail apdt-TDMB2 stainless steel muzzle break-has decal on right side "this gun fucks poop up" red color fill on lower It is a 7.62x51 AND I LOVE THESE RIFLES! AND THANKS YOU ALL FOR THE WORDS OF ADVICE! Quote Link to comment Share on other sites More sharing options...
blue109 Posted July 13, 2014 Report Share Posted July 13, 2014 nice...but confused about your buffer setup. are you running a 5.56 carbine buffer or a 308 carbine buffer and what spring? any reason you didn't use a 308 rifle buffer? has this setup been functioning fine? Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 13, 2014 Report Share Posted July 13, 2014 No, that won't function fine. Sounds like he's using the AR-15 H3 buffer. Not gonna work. Well, it'll go bang the first time... Quote Link to comment Share on other sites More sharing options...
78transamlvr Posted July 13, 2014 Author Report Share Posted July 13, 2014 (edited) Hello there Mr or Mrs Blue 109 and 98Z5v. Its a A2 full rifle spring and a 5.5oz carbine buffer which is the same weight as a full lenght riffle buffer and it works flawlessly. The rifle buffer was causing a short stroke, due to the bolt being longer than a 5.56 bolt. So to correct this problem I had to use a carbine buffer and make it weight 5.5oz and the weight is the same spring does the job and fixed. The one that came with my LR was 3.8oz carbine so to light to run in a riffle set up. so I have the parts here to make it work and all the knowldge from this formn. And yes I can rapid fire a 20 round mag all day(I'll make a video next time I go shooting). And if you dont believe me simply try it. I understand it maybe against the beliefs you may hold. It is the science that works. Edited July 13, 2014 by 78transamlvr Quote Link to comment Share on other sites More sharing options...
blue109 Posted July 13, 2014 Report Share Posted July 13, 2014 (edited) so you initially tried a 5.56 rifle spring and buffer. curious why you didn't use a 308 rifle spring and buffer? Edited July 13, 2014 by blue109 Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 13, 2014 Report Share Posted July 13, 2014 Hello there Mr or Mrs Blue 109 and 98Z5v. Its a A2 full rifle spring and a 5.5oz carbine buffer which is the same weight as a full lenght riffle buffer and it works flawlessly. It hasn't worked yet - or it's only worked once. If you've shot that combo, take a look at the shoulders on the BCG, where they slammed into the back of your lower receiver, and gouged it up. Seems like you're concerned about putting the correct weight buffer in there, but what you're missing is the correct length of buffer. The rifle buffer was causing a short stroke, due to the bolt being longer than a 5.56 bolt. Yeah, a 5.56 rifle buffer would be too long, and cause it to short stroke. So to correct this problem I had to use a carbine buffer and make it weight 5.5oz and the weight is the same spring does the job and fixed. The one that came with my LR was 3.8oz carbine so to light to run in a riffle set up. so I have the parts here to make it work and all the knowldge from this formn. And yes I can rapid fire a 20 round mag all day(I'll make a video next time I go shooting). And if you dont believe me simply try it. I understand it maybe against the beliefs you may hold. It is the science that works You need to be using 308 AR buffer parts, not 5.56 buffer parts - that includes the spring. If you're using 308 AR parts, please be specific and state that. Your info will only confuse others later, and lead them to believe that you can mix/match that stuff between AR15s and 308ARs - which is definitely, certainly, not the case. That's the science that works. Put your videos up. <thumbsup> Quote Link to comment Share on other sites More sharing options...
blue109 Posted July 13, 2014 Report Share Posted July 13, 2014 ! Quote Link to comment Share on other sites More sharing options...
Toolndie7 Posted July 13, 2014 Report Share Posted July 13, 2014 <munch> Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 15, 2014 Report Share Posted July 15, 2014 OP, update?... Quote Link to comment Share on other sites More sharing options...
shibiwan Posted July 15, 2014 Report Share Posted July 15, 2014 did it blow up on him? Quote Link to comment Share on other sites More sharing options...
shibiwan Posted July 16, 2014 Report Share Posted July 16, 2014 Still waiting to see pics of the internal damage on the lower receiver.... Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 16, 2014 Report Share Posted July 16, 2014 Maybe he converted his rifle buffer with H3 weights, or something. But, a rifle buffer is already H3-weighted. At any rate, he says he's shot it, rifle stock, carbine buffer. I just want some clarification on the work or parts, before people start thinking that they can toss anything together, shoot it, and everything works out gravy. It won't be long before they come on here, say they read it on the internet and the OP said it worked fine for him, and we're diagnosing their broken $hit that went wrong... Quote Link to comment Share on other sites More sharing options...
shibiwan Posted July 16, 2014 Report Share Posted July 16, 2014 It won't be long before they come on here, say they read it on the internet and the OP said it worked fine for him, and we're diagnosing their broken $hit that went wrong... ^^ this is what I'm concerned about. This same info from the guy who says a 308 gas tube is different from a standard 5.56 gas tube......much misinformation. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 16, 2014 Report Share Posted July 16, 2014 ^^ this is what I'm concerned about. This same info from the guy who says a 308 gas tube is different from a standard 5.56 gas tube......much misinformation. I hear ya. Right here is where NOTHING makes sense but he swears it works: Installed: Magpul prs stock with red color fill/punisher skull-5.5oz carbine buffer-full lenght A2 tube and spring Not happeneing. We know for a fact he's got a rifle receiver extension on that thing, because the PRS just won't go onto a carbine receiver extension. So, PRS with rifle receiver extension. Check. 5.5oz carbine buffer - NOT. RIfle spring, with carbine buffer - not smart. At any rate, he's shot it. Has to be at least once, but probably only once. Waiting to hear feedback from OP on this one. I detect bull$hit. Strongly. Quote Link to comment Share on other sites More sharing options...
atplowman Posted July 18, 2014 Report Share Posted July 18, 2014 THIS is the reason these forums are handy...because some type what they run and it doesn't work. I've been doing research, in order to not screw up my first 308 build...this kinda thing gets confusing. In fact, I'm going to threadjack, because you guys seem to know what you're talking about. Problem: A sales guy is trying to inform me that a standard Carbine MIL-SPEC buffer tube will not work with a 308 Carbine Spring/308 Carbine buffer setup. Black Rain "told him" that only commercial tubes will run properly. What? I have a DPMS type lower/upper (in case it matters). He claims the tube is not long enough, even though the 308 Carbine buffer is shorter. He's holding up my order over this...what say you? Quote Link to comment Share on other sites More sharing options...
blue109 Posted July 18, 2014 Report Share Posted July 18, 2014 (edited) there is no internal length difference between a mil spec and commercial tube mil spec AR15 extension + 308 carbine buffer and 308 carbine spring is good to go. commercial spec Ar15 extension + 308 carbine buffer and 308 carbine spring is good to go standard rifle length AR15 extension + 308 rifle buffer and 308 rifle spring is good to go someone else can chime in with the armalite option... Edited July 18, 2014 by blue109 Quote Link to comment Share on other sites More sharing options...
washguy Posted July 18, 2014 Report Share Posted July 18, 2014 THIS is the reason these forums are handy...because some type what they run and it doesn't work. I've been doing research, in order to not screw up my first 308 build...this kinda thing gets confusing. In fact, I'm going to threadjack, because you guys seem to know what you're talking about. Problem: A sales guy is trying to inform me that a standard Carbine MIL-SPEC buffer tube will not work with a 308 Carbine Spring/308 Carbine buffer setup. Black Rain "told him" that only commercial tubes will run properly. What? I have a DPMS type lower/upper (in case it matters). He claims the tube is not long enough, even though the 308 Carbine buffer is shorter. He's holding up my order over this...what say you? He is just plain wrong.....all my 308 stuff/tubes is mil spec....as a matter of fact I dont even own commercial tubes on any ar's :) Wash Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted July 18, 2014 Report Share Posted July 18, 2014 (edited) He is just plain wrong.....all my 308 stuff/tubes is mil spec....as a matter of fact I dont even own commercial tubes on any ar's :) Wash Same here, sounds like he's butthurt about being wrong. Blue is dead on, follow that and you'll be good to go Edited July 18, 2014 by edgecrusher Quote Link to comment Share on other sites More sharing options...
shibiwan Posted July 18, 2014 Report Share Posted July 18, 2014 armalite carbine extension + AR15 carbine buffer + armalite 308 spring = works Quote Link to comment Share on other sites More sharing options...
atplowman Posted July 18, 2014 Report Share Posted July 18, 2014 Check, check, check... And mate. This is reassuring, as everything here sounds straight-up and logical. I appreciate solid info. Hopefully I can share some (info that is), at some point;) Quote Link to comment Share on other sites More sharing options...
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