Wednesday, November 11, 2015

The Home Depot AR Lower - Part 1

Whelp, here it is.  BioMed C School has been bogging me down this past month and the difficulty is just ramping up.  So all the crazy ideas I always keep talking about are going on super-duper-hold.

This video is a little old (from summer, before the accident) but I initially had no intention to upload it since it jams in the video (it was mainly a magazine seating issue).  Since I never bothered to test fire it after fixing it (and adding an AK grip) and have nothing else to upload, I'm uploading it as a proof-of-concept thingy for now.  The upper assembly was actually brand-new at the time of filming and I had never fired a rifle caliber in so short a barrel, so the huge-ass muzzle flashes were freaking me out a bit.

The flat AR has been done hundreds of times in some form or another (see links at end of post) and I'm not offering anything new to the table.  My original intention of this was that I thought this would be useful to people such as Maryland gun owners after their 2013 "Assault Weapons" extension ban (that ultimately made the AR15 illegal to purchase after a certain date).  In 2014 I wrote a long-winded tirade about Maryland law but I never posted it because it was pretty outdated by the time I got to where I am now - it seemed at some point Marylanders found ways to acquire AR15s or clones through legal means, which is a good thing.  Here is an excerpt from my unreleased rant:
A flat metal AR lower receiver would require no complex milling, while a standard 80% AR lower requires milling or some complicated, time-consuming, and costly setup involving a jig and a drill press in addition to an already existing 80% paperweight which can only be bought online.  If I ever need to outfit a flipmode squad of hillbillies, I think it would be easier, cheaper, and quicker to cut out plates from bar stock or whatever, drill out the holes and bolt together an AR lower than to order a bunch of expensive 80% lowers and mill them out with a drill press.
I still think that part holds true, anyways.  If someone mass-produced side plates along with spacers, screws, and a buffer tower and released it as a kit, I think this would be an easier-to-assemble alternative to something such as an 80% lower or AK47 blank receiver.  Just look how cheap the Jack Squat flats are - while they are cheap, it requires some knowledge on basic welding.  Currently my specific build uses a few prefabricated parts, the most costly bit being an "AR-15 FCG testing jig" which was $30 (note: Strike Industries has no provision for a rear takedown pin, the cheaper ones do).  In the future I will show how I made my own FCG holding assembly using square tubing, but that is a post for another day.

I'll post a detailed parts list and step-by-step instructions in the next month, hopefully on Thanksgiving weekend.
Still a work in progress
Related Links:
Plywood/SheetMetal AR - Milled from wood, reinforced with sheetmetal.
Old screw-plate AR15 (mirrored from Geocities) - Really old page from the late 90's.
Orion's Hammer's Cutting AR15 - Made from plastic cutting board.
Orion's Hammer Wood AR - Milled from pinewood.
Welded Sheet Metal AR - A lower welded from sheet metal.
Jack Squat's Flat AR15 kit - A commercially available "puzzle piece" lower for less than $30