bmiller Posted November 23, 2017 Share Posted November 23, 2017 I shot my rifle with the guard bolt and barrel today. I was stuffed with turkey, so I am not calling this my best work. All groups are 5 shots and were shot at 25 yards with a very primative bench. The top group is Montana gold 124 grain round nose. Second is 115 grain Kings shooters supply purple coated bullets. Third group is 124 grain Kings coated bullets. All loads are 140 ish power factor. Link to comment
bmiller Posted November 23, 2017 Share Posted November 23, 2017 Shot one 5 shot group at 50 yards with my remaining ammo. Link to comment
TGibe Posted November 23, 2017 Share Posted November 23, 2017 I have a Spartan Lower (I think it's an NFA clone) and am wondering if it will work with the upper? I'm trying to save some money, both on total cost and WA Excise tax (uppers do not have to go to FFA). I could: 1) Just get an upper and try it with my lower (least expensive). I am worried about over insertion... 2) Get the upper and then order only a lower receiver and transfer my hiperfire, stock, etc. 3) Order upper and lower seperately (most expensive) Thoughts? Thanks, Allen Link to comment
L9X25 Posted November 23, 2017 Share Posted November 23, 2017 4) Move away from Washington Link to comment
TGibe Posted November 24, 2017 Share Posted November 24, 2017 14 minutes ago, L9X25 said: 4) Move away from Washington Working on it. Problem is Daughters (and future grandkids) are here. Wife would love to move also, but see last sentence :-) Link to comment
bmiller Posted November 24, 2017 Share Posted November 24, 2017 (edited) 2 hours ago, TGibe said: I have a Spartan Lower (I think it's an NFA clone) and am wondering if it will work with the upper? I'm trying to save some money, both on total cost and WA Excise tax (uppers do not have to go to FFA). I could: 1) Just get an upper and try it with my lower (least expensive). I am worried about over insertion... 2) Get the upper and then order only a lower receiver and transfer my hiperfire, stock, etc. 3) Order upper and lower seperately (most expensive) Thoughts? Thanks, Allen Looking at my NFA lower, it looks like it might be possible to utilize the slot were the ejector rides to make a shelf that would drop in. You can't have the ejector in the lower with the guard system anyways. I am going to work on this. QC10 utilizes something similar to this in their lowers. Edited November 24, 2017 by bmiller Link to comment
Ming the Merciless Posted November 24, 2017 Share Posted November 24, 2017 59 minutes ago, L9X25 said: 4) Move away from Washington Yeah, that's always good advice, run away from your problem. Which is great if you're a hermit with no family, friends or career until enough other idiots running away from their problems bring the same crap with them you're trying to get away from. Ask anybody in Oregon or Washington. Link to comment
bmiller Posted November 24, 2017 Share Posted November 24, 2017 On 11/22/2017 at 4:10 PM, BartCarter said: Here are pics of the mag stop ledge. Bart, could you take another pic like this , but with a mag inserted? I am curious about the mag height relative to the lower. Thanks Brian Link to comment
bmiller Posted November 24, 2017 Share Posted November 24, 2017 Ok, I just printed version 1.0. I need to change a couple things, but there is a good chance a piece can be added to the ejector slot that will work as a mag stop. Link to comment
Flatland Shooter Posted November 24, 2017 Share Posted November 24, 2017 5 minutes ago, bmiller said: Ok, I just printed version 1.0. I need to change a couple things, but there is a good chance a piece can be added to the ejector slot that will work as a mag stop. Patent it before CMMG does. (Then you can donate all your profits to an attorney.) Are you going to lock it in place with the set screws from the ejector? Link to comment
BartCarter Posted November 24, 2017 Share Posted November 24, 2017 3 hours ago, bmiller said: Bart, could you take another pic like this , but with a mag inserted? I am curious about the mag height relative to the lower. Thanks Brian Saturday Link to comment
TGibe Posted November 24, 2017 Share Posted November 24, 2017 3 hours ago, bmiller said: Ok, I just printed version 1.0. I need to change a couple things, but there is a good chance a piece can be added to the ejector slot that will work as a mag stop. Awesome. Can’t wait to see it. Cheers, Allen Link to comment
bmiller Posted November 24, 2017 Share Posted November 24, 2017 Printed 3.0. Need to cut a small slot in the upper and I will be able to try it out later today. If it works, I'll run it on the Cnc and post pics. Link to comment
bmiller Posted November 25, 2017 Share Posted November 25, 2017 Cut my upper, tried the printed prototype. It seems to work great, and is less fussy about various mags than the QC10 lower. I just finished machining the prototype out of 6061. I will be posting a video of it at some point shortly. Link to comment
TGibe Posted November 25, 2017 Share Posted November 25, 2017 1 hour ago, bmiller said: Cut my upper, tried the printed prototype. It seems to work great, and is less fussy about various mags than the QC10 lower. I just finished machining the prototype out of 6061. I will be posting a video of it at some point shortly. Great work Brian. If I purchased a complete upper from them I imagine I wouldn’t have to make the cut to the upper you mention? Looking forward to the video. Link to comment
bmiller Posted November 25, 2017 Share Posted November 25, 2017 If you are putting the upper on a NFA style lower, you would have to make the cut if you wanted to use the mag stop as designed. You could file off the tab and it would probably work fine. I wanted a little extra strength in the design, I tend to smash the mags in when I am under the clock. Link to comment
TGibe Posted November 25, 2017 Share Posted November 25, 2017 57 minutes ago, bmiller said: If you are putting the upper on a NFA style lower, you would have to make the cut if you wanted to use the mag stop as designed. You could file off the tab and it would probably work fine. I wanted a little extra strength in the design, I tend to smash the mags in when I am under the clock. What if it is a complete CMMG upper? Link to comment
Flatland Shooter Posted November 25, 2017 Share Posted November 25, 2017 3 hours ago, bmiller said: If you are putting the upper on a NFA style lower, you would have to make the cut if you wanted to use the mag stop as designed. You could file off the tab and it would probably work fine. I wanted a little extra strength in the design, I tend to smash the mags in when I am under the clock. If you do not have LRBHO and always load to a closed bolt, is your mag stop still needed? Link to comment
BartCarter Posted November 25, 2017 Share Posted November 25, 2017 On 11/23/2017 at 5:17 PM, bmiller said: Bart, could you take another pic like this , but with a mag inserted? I am curious about the mag height relative to the lower. Thanks Brian Here you go. Link to comment
bmiller Posted November 25, 2017 Share Posted November 25, 2017 58 minutes ago, Flatland Shooter said: If you do not have LRBHO and always load to a closed bolt, is your mag stop still needed? Yes, if you want to monopod without it jamming. Otherwise, maybe not. Link to comment
bmiller Posted November 25, 2017 Share Posted November 25, 2017 3 hours ago, TGibe said: What if it is a complete CMMG upper? The lower dictates the magazine height. I don't think the upper would matter. Link to comment
bmiller Posted November 26, 2017 Share Posted November 26, 2017 3 hours ago, BartCarter said: Here you go. Thank you! Link to comment
Screaminyz Posted November 27, 2017 Share Posted November 27, 2017 Brian, All of the pics above are of a NFA lower or QC10?Sent from my iPhone using Tapatalk Link to comment
bmiller Posted November 27, 2017 Share Posted November 27, 2017 The pic I posted on Instagram is in a NFA lower. Link to comment
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