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  justin22885

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Posted: November 04 2017 at 2:47am | IP Logged Quote justin22885

the top portion of this receiver is designed to be narrow enough that it shouldnt interfere with anything mounted on the rail, so the rail itself sits much lower, the AR lower is just there as a place holder for now


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  backbencher

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Posted: November 04 2017 at 11:47am | IP Logged Quote backbencher

I find it amusing and intriguing that the AR has become so ubiquitous a 60 year old design is your starting point.
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  justin22885

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Posted: November 04 2017 at 1:28pm | IP Logged Quote justin22885

its not my starting point, the lower is simply used for scale, as stated its just a place holder.. i was planning to use mag adapters similar to what the G36 uses.. in fact, an AR lower wont even work on that since the bottom of the receiver sits too low for the magazines to reach the chamber

so the upper isnt even remotely close to an AR, the lower wont be, the barrel isnt, the bolt and bolt carrier arent, the barrel extension bolts in, gas system is closer in line with an FAL.. i think you are just so AR-centric that you think you are seeing them everywhere

i may switch to aluminum for this, add some features id like, maybe beef it up around the receiver and CNC machine it out of a block.. but that would cost so much, with so much weight, a receiver like that really needs to be extruded i think, if not made from sheet
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  justin22885

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Posted: November 09 2017 at 7:12am | IP Logged Quote justin22885

i COMPLETELY changed the upper receiver on that last one, focusing on aluminum construction allowing me to use thicker walls while reducing weight, it also allows me to countersink the holes in the side of the receiver to rivet the interior rail in with so once cerakoted the rivets will be invisible.  plus the thicker wall allows more "bite" for the bolts that will hold the shell deflectors

also using aluminum the rail is cut directly into it, this allows the gas system to be moved up under the rail where previously there had to be clearance to mount an existing rail blank, this allows me to get a rail that sits much lower which is important when you consider most rail mounted optics are made for the AR and on rifles like the SCAR which has a very tall rail height it makes many of the optics sit too high

also making it out of aluminum, and not caring about low tech manufacturing (planning on a milling machine for this) i'll probably also design built in front and rear sights that will sit flush with the rail so to be completely out of the way when folded, i HATE how magpul BUIS to co-witness on an AR still obstruct a lot of the sight picture through a red dot

i thought about "quick change" barrels like the steyr AUG with lugs or an interrupted thread, still a possibility, but i also looked at the beretta ARX-100, but decided against that as i do not have confidence in that setup lending itself well to accuracy

but using aluminum to give me more bulk to machine features into the rifle without adding weight, while still having hardened steel rails for a slicker bearing surface is really letting me do stuff i couldnt do with sheet metal.. next year im going to start building a fairly large workshop and the center of that is going to be a refurbished bridgeport converted to CNC, and this weapon, when i have the tools to make it is going to be pretty awesome
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