Bkolar81 Posted July 17, 2017 Report Share Posted July 17, 2017 I recently built my first AR15 a few months ago and what can I say...the bug bit me. I am now starting my first .308AR build and have a few questions. I picked up an M5E1 builder kit from Aero Precision and I am starting to look for a barrel. The builder kit came with a Magpul STR stock. I am looking to go 18 inches on the barrel length with a mid length gas system. Will I be fine with this setup using a buffer system from heavy buffers? This build is a little more scary for me since I bought a complete upper for my AR15 when I built it and didn't have to mess with all this parts configuration. Also I assume I should buy my BCG from the same barrel manufacturer for head spacing right. Sorry for multiple questions within this post. Thanks! Quote Link to comment Share on other sites More sharing options...
survivalshop Posted July 17, 2017 Report Share Posted July 17, 2017 A basic answer to your question is , yes , your choice of Components will work . Do you have the Receiver extension already ? ( Buffer tube ) Quote Link to comment Share on other sites More sharing options...
Bkolar81 Posted July 17, 2017 Author Report Share Posted July 17, 2017 No sir I do not have a buffer tube yet. I assume it is heavier duty and longer than a standard buffer for an AR15. Can you get one from heavy buffers when you buy a buffer and spring? Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 17, 2017 Report Share Posted July 17, 2017 1 hour ago, Bkolar81 said: No sir I do not have a buffer tube yet. I assume it is heavier duty and longer than a standard buffer for an AR15. With one exception, it's the same as AR15 parts. AR15 Carbine receiver extension (7.000" internal depth) for collapsible stocks - with a special, shorted 308AR carbine buffer and different 308AR carbine buffer spring. For Rifle-length extensions, it's still an AR15 part, but with 308AR shortened rifle buffer, and a 308AR rifle buffer spring. The extensions are the same as AR15 parts. The buffers and springs are NOT the same as AR15 parts. The exception is the AR-10 recoil parts - the real, Armalite AR-10 parts. They use the same buffer spring for AR-10 carbine and rifle, the EA1095 spring. They use the same RIFLE receiver extension as an AR15. It's the same 308AR rifle buffer (in length, 5.200") as any DPMS-based rifle recoil system. They use a longer Carbine receiver extension (7 5/8" internal depth), with the EA1095 buffer spring, and a standard AR15 Carbine H3 buffer... The longer receiver extension allows them to use the AR15 Carbine H3 buffer. Make sense? If not, I'll get into it more. Quote Link to comment Share on other sites More sharing options...
Bkolar81 Posted July 17, 2017 Author Report Share Posted July 17, 2017 So I can use a standard AR15 buffer tube for my collapsible Magpul stock and use the EA1096 spring with a buffer from heavy buffers? Quote Link to comment Share on other sites More sharing options...
survivalshop Posted July 17, 2017 Report Share Posted July 17, 2017 21 minutes ago, Bkolar81 said: So I can use a standard AR15 buffer tube for my collapsible Magpul stock and use the EA1096 spring with a buffer from heavy buffers? If thats what Slash recommends from Heavy Buffers , Because he Custom Cuts some Springs . Quote Link to comment Share on other sites More sharing options...
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