MLM0358 107 Posted August 13, 2016 Report Share Posted August 13, 2016 Hi all- here is my latest race S12 build - My best ever so far and only one in existence. Has a railed/hinged dust cover I machined. I also made the carbon fiber hand guard and the stock adapter. The stock is offset up so the center line of your shoulder is in the center line of the bore. Has a 1" recoil pad and the stock is shortened so the trigger pull length is exactly the same as an AR15. . The barrel is 16" and internally threaded for chokes with a pinned and welded compensator for a legal overall length. The axis pins are machined from polished 4130 steel and are keyed into a retaining plate for anit-rotation and no possibility of falling out. AR style safety. Titanium piston rod, gas puck and a lightened bolt carrier. Fully adjustable trigger with 3# trigger pull - slight takeup and no overtravel. . Custom made precision ground guide rod with fully progresssive spring increasing from 11# to 16# . Tungsten and graphite black cerakote over Type III hard anodize on all aluminum parts. Range test record on plate racks = 18 targets in 6.8 seconds. Almost no muzzle climb and the modest recoil impulse is straight back into shoulder. 7 Quote Link to post Share on other sites
ChileRelleno 7,074 Posted August 13, 2016 Report Share Posted August 13, 2016 Looks nice and sounds like it runs great. Quote Link to post Share on other sites
lowrydesign 1 Posted August 16, 2016 Report Share Posted August 16, 2016 Wow. You've done a lot of great modifications to it. I especially like how you raised the stock. Can you go more into depth on the top cover and how you did it? Quote Link to post Share on other sites
pedal2alloy 206 Posted August 17, 2016 Report Share Posted August 17, 2016 That is absolutely great. You must have built a lot of other things. Quote Link to post Share on other sites
Machinist 150 Posted August 17, 2016 Report Share Posted August 17, 2016 Excellent machine work, very cool gun. Quote Link to post Share on other sites
MLM0358 107 Posted August 18, 2016 Author Report Share Posted August 18, 2016 All I can say is the machining makes a lot of chips. I've been wanting to do a hinged dust cover for a long time. It's been an evolution -- Here's one of my other S12s - I didn't like the optic height over bore (which is at the minimum to get the dust cover off). I like the hinged dust cover and offset stock much better - less recoil, easier to take apart, any rail mount optic fits, better height over bore and better optic placement on the rail. Quote Link to post Share on other sites
gunfun 3,931 Posted August 18, 2016 Report Share Posted August 18, 2016 Both look great. Quote Link to post Share on other sites
Machinist 150 Posted August 18, 2016 Report Share Posted August 18, 2016 Very impressive... Talented machinist! Quote Link to post Share on other sites
lowrydesign 1 Posted August 21, 2016 Report Share Posted August 21, 2016 Talented indeed. You're definitely on to something here. Ever think about having these made to sell? I know that I would put this on my saiga for sure! Quote Link to post Share on other sites
MLM0358 107 Posted August 22, 2016 Author Report Share Posted August 22, 2016 No plans for now. Way too much work. Quote Link to post Share on other sites
svibeardly 1 Posted August 22, 2016 Report Share Posted August 22, 2016 Supergood for inspiration as I currently plan my own racebuild. Was thinking about doing a handguard just like the one you built. The magwell, is that R&Rs or something you also fabricated yourself? Quote Link to post Share on other sites
MLM0358 107 Posted August 24, 2016 Author Report Share Posted August 24, 2016 Magwell is R&R as is the pistol grip adapter. They make great stuff. The hand guard is 1.875 O.D. x .060" wall carbon fiber tube. Readily available on Ebay. Some machining and aluminum welding to make the tube ends, then hard anodized. When machining the carbon fiber I wear a respirator and use a vacuum to suck up the dust. Stuff is bad news to breathe. Carbide cuts it fine. I get a close a possible with a Dremel cut off wheel, then machine the rest with a carbide end mill. 1 Quote Link to post Share on other sites
pedal2alloy 206 Posted August 24, 2016 Report Share Posted August 24, 2016 Magwell is R&R as is the pistol grip adapter. They make great stuff. The hand guard is 1.875 O.D. x .060" wall carbon fiber tube. Readily available on Ebay. Some machining and aluminum welding to make the tube ends, then hard anodized. When machining the carbon fiber I wear a respirator and use a vacuum to suck up the dust. Stuff is bad news to breathe. Carbide cuts it fine. I get a close a possible with a Dremel cut off wheel, then machine the rest with a carbide end mill. You are beyond the normal "gun nut" Do you make aircraft parts or something? If you don't mind me asking Quote Link to post Share on other sites
Vance665 225 Posted August 24, 2016 Report Share Posted August 24, 2016 Amazing work. Thanks for posting! Quote Link to post Share on other sites
gunfun 3,931 Posted August 24, 2016 Report Share Posted August 24, 2016 Magwell is R&R as is the pistol grip adapter. They make great stuff. The hand guard is 1.875 O.D. x .060" wall carbon fiber tube. Readily available on Ebay. Some machining and aluminum welding to make the tube ends, then hard anodized. When machining the carbon fiber I wear a respirator and use a vacuum to suck up the dust. Stuff is bad news to breathe. Carbide cuts it fine. I get a close a possible with a Dremel cut off wheel, then machine the rest with a carbide end mill. Thanks for the how-to. I've toyed with doing that a few times. I want some roughly triangular tube What were your search terms? ebay sucks for finding dimensional materials. Quote Link to post Share on other sites
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