JJ109 Posted June 15, 2016 Report Share Posted June 15, 2016 Hey guys im new here im sure a lot of my questions have been already asked. Building a 18" 308 dpms med range set up. I have broken down my AR15 and put back together many of times. Never built one. Im going to use BHW 308 1/11 barrel . What length gas system and how does that effect any other of my choices???? I only have an upper receiver. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted June 15, 2016 Report Share Posted June 15, 2016 18" will usually have a Mid length or Rifle length Gas system , I have Rifle length on all three of my 308AR builds , 16",18" & 20" . Plenty of gas power with the Rifle length system with the 308 cartridge , makes a little softer shooter . You can use the Mid lengths system & an adj. Gas Block , they are popular with a lot of people . I don't use them , I like a lot of Gas & there are many ways to reduce recoil impulse with out reducing Gas signature , which you could have issues with different types of ammo if set up for one brand or type . With different Gas systems , the Hand Guard length will determine if you want to cover the Gas Block , if thats what you want . A 12" HG will completely cover the Gas Block of a Mid Length , but with a rifle length Gas system , the Gas Block will be out in front of it & would need a 13.5" HG length to cover it , Your choice . Quote Link to comment Share on other sites More sharing options...
JJ109 Posted June 15, 2016 Author Report Share Posted June 15, 2016 Thanks survialshop. This is the answer i was looking for. Also do you know if the gas system is affected by the buffer tube and spring selection ???? Quote Link to comment Share on other sites More sharing options...
shepp Posted June 15, 2016 Report Share Posted June 15, 2016 Welcome to the forum feel free to post in the intro section Quote Link to comment Share on other sites More sharing options...
mrmackc Posted June 15, 2016 Report Share Posted June 15, 2016 On 6/15/2016 at 5:36 PM, JJ109 said: Thanks survialshop. This is the answer i was looking for. Also do you know if the gas system is affected by the buffer tube and spring selection ???? Expand On 6/15/2016 at 5:36 PM, JJ109 said: Thanks survialshop. This is the answer i was looking for. Also do you know if the gas system is affected by the buffer tube and spring selection ???? Expand Yes, The gas system is independant of the buffer and buffer spring, but the action of the BCG is determined by the gas system and buffer system working together to feed, extract, and eject. Check the Videos at David Tubb website Videos. Quote Link to comment Share on other sites More sharing options...
mrmackc Posted June 15, 2016 Report Share Posted June 15, 2016 On 6/15/2016 at 6:11 PM, mrmackc said: I hope S.Shop won't get too angry for me replying to your question In My Humble Opinion. Yes, The gas system is independant of the buffer and buffer spring, but the action of the BCG is determined by the gas system and buffer system working together to feed, extract, and eject. Check the Videos at David Tubb website Videos. Expand Quote Link to comment Share on other sites More sharing options...
JJ109 Posted June 15, 2016 Author Report Share Posted June 15, 2016 I appreciate the info and help. Like i said i disassembled and reassembled but not built from scratch . Quote Link to comment Share on other sites More sharing options...
survivalshop Posted June 15, 2016 Report Share Posted June 15, 2016 Always remember we are all here to help & good videos are always a plus Quote Link to comment Share on other sites More sharing options...
JJ109 Posted June 16, 2016 Author Report Share Posted June 16, 2016 Quote Link to comment Share on other sites More sharing options...
mineralman55 Posted June 16, 2016 Report Share Posted June 16, 2016 On 6/15/2016 at 10:07 PM, survivalshop said: Always remember we are all here to help & good videos are always a plus Expand And to encourage spending more money. Bunch of enablers Grrrr. Quote Link to comment Share on other sites More sharing options...
shepp Posted June 16, 2016 Report Share Posted June 16, 2016 On 6/15/2016 at 9:18 PM, JJ109 said: I appreciate the info and help. Like i said i disassembled and reassembled but not built from scratch . Expand You tube is a God sent, I was nervous too but there are videos for everything. Also places like midway USA and brownells also has great clips linked to certain parts Quote Link to comment Share on other sites More sharing options...
JJ109 Posted June 16, 2016 Author Report Share Posted June 16, 2016 (edited) On 6/16/2016 at 1:35 PM, mineralman55 said: And to encourage spending more money. Bunch of enablers Grrrr. Expand I hear Ya man. I cant order any more parts or anything cause if my old lady finds out ill be sleeping in the dog house. Lol Edited June 16, 2016 by JJ109 Quote Link to comment Share on other sites More sharing options...
Rsquared Posted June 16, 2016 Report Share Posted June 16, 2016 On 6/16/2016 at 1:35 PM, mineralman55 said: And to encourage spending more money. Bunch of enablers Grrrr. Expand Enablers? Who? Us? We don't do that. Now.......we may, from time to time, gently nudge somebody in the direction of a purchase. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted June 16, 2016 Report Share Posted June 16, 2016 On 6/16/2016 at 8:07 PM, Rsquared said: Enablers? Who? Us? We don't do that. Now.......we may, from time to time, gently nudge somebody in the direction of a purchase. Expand Its not our fault ! Its not like we twist their arm or anything Quote Link to comment Share on other sites More sharing options...
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