Kmarsh1966 Posted October 17, 2016 Share Posted October 17, 2016 I have an Anderson Rifle M4 that I am using for 3 gun. Only upgrades from the base model is Hiperfire 24C trigger, BAD Charghing handle latch, Michulek Muzzle Break, and Midwest Industries Handguard. This gun will shoot SUB MOA groups at 100 & 200 yards. I think I would like to upgrade to a low mass BCG, and assume I need an adjustable gas block. My rig appears to be a carbine length gas system. A couple of options. 1 Upgrade Gas System in current upper. 2 build a mid/rifle length upper for 3 gun From what I have seen it appears the Rifle Length will provide the softest shooting. My goal is to minimize recoil for double taps on close and dirty stages. I shoot 77 gr for long range, and 55 gr for 100 yard and closer Thanks for your comments/suggestions Link to comment Share on other sites More sharing options...
EliteGuard Posted October 17, 2016 Share Posted October 17, 2016 A low mass BCG with an adjustable gas block on a rifle length upper will recoil very little. I have heard that a rifle length buffer over a carbine length with a low mass buffer will help even more, but I have yet to compare a rifle to a carbine. The VLTOR A5 system allows you to use a rifle length spring with a special buffer and use an adjustable stock. I have yet to find a low mass buffer for it yet though. Link to comment Share on other sites More sharing options...
txolds442 Posted October 18, 2016 Share Posted October 18, 2016 It's no secret a longer gas system shoots softer/cleaner. I would start with an adjustable gas block first, that'll help tame some of the over gasing from the carbine length system. You can always use that same gas block if you decide to re barrel with a rifle length system and low mass bcg. Link to comment Share on other sites More sharing options...
jbran267 Posted October 21, 2016 Share Posted October 21, 2016 Definitely the gas block will get you the most results for your money. If your Anderson gas block is pinned, you may want to just get an adjustable gas key for your bolt carrier. Adjusting the gas really helps to level the playing field between carbine and mid/rifle gas. Low mass bcg is a huge upgrade too, but costs substantially more. Link to comment Share on other sites More sharing options...
Kmarsh1966 Posted October 23, 2016 Author Share Posted October 23, 2016 Thanks for all the input. Odin arrived in the mail to day, time to swap that out and get to the range for a trial. Link to comment Share on other sites More sharing options...
PatriotMRD Posted October 23, 2016 Share Posted October 23, 2016 On 10/17/2016 at 2:40 PM, EliteGuard said: A low mass BCG with an adjustable gas block on a rifle length upper will recoil very little. I have heard that a rifle length buffer over a carbine length with a low mass buffer will help even more, but I have yet to compare a rifle to a carbine. The VLTOR A5 system allows you to use a rifle length spring with a special buffer and use an adjustable stock. I have yet to find a low mass buffer for it yet though. The lightest buffer for the A5 system is Vltor's A5H0 buffer (3.8oz). JP's LMOS rifle length buffer weighs 3.0oz. Link to comment Share on other sites More sharing options...
biglou13 Posted October 24, 2016 Share Posted October 24, 2016 Tac com weigh .6 ounce ..... 1.2 ish since it's a 2 part..... No consideration for adjustable gas key? Link to comment Share on other sites More sharing options...
Kmarsh1966 Posted November 3, 2016 Author Share Posted November 3, 2016 UPDATE I got an Odin Adjustable Gas block. Took it out to the range and adjusted it. Made a major difference in how soft the rifle shoots. I can understand the concept of different length systems, but I would also assume limiting the gas IE: lowering the gas pressure should effectively do the same thing. I am really happy with my setup. Link to comment Share on other sites More sharing options...
TonytheTiger Posted November 3, 2016 Share Posted November 3, 2016 8 minutes ago, Kmarsh1966 said: I can understand the concept of different length systems, but I would also assume limiting the gas IE: lowering the gas pressure should effectively do the same thing. Nope. Link to comment Share on other sites More sharing options...
Kmarsh1966 Posted November 3, 2016 Author Share Posted November 3, 2016 15 minutes ago, TonytheTiger said: Nope. Well then I got to see how much difference that can make, becaus the Adjustable black made alot. Hate to give up a barrell that shoots sub MOA, just scared what I could end up with accuracy wise. Link to comment Share on other sites More sharing options...
Dr Mitch Posted November 3, 2016 Share Posted November 3, 2016 You aren't lowering the gas pressure. You are lowering the gas volume. Gas pressure is reduced by increasing the volume that the gas is contained within, ie barrel length and port placement. Link to comment Share on other sites More sharing options...
TonytheTiger Posted November 3, 2016 Share Posted November 3, 2016 (edited) 49 minutes ago, Kmarsh1966 said: Well then I got to see how much difference that can make, becaus the Adjustable black made alot. Hate to give up a barrell that shoots sub MOA, just scared what I could end up with accuracy wise. I'm not saying you have to buy/sell anything. Dr Mitch beat me to it, you decrease volume with a smaller gas port, not pressure. Your still better off with an AGB but your a long ways away from a rifle length gas system. As to your last point, there's lots of manufacturers that have earned reputations for sub MOA barrels... Edited November 3, 2016 by TonytheTiger Link to comment Share on other sites More sharing options...
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