MemphisMechanic Posted February 1, 2017 Share Posted February 1, 2017 (edited) Pneumatic die grinder. Carbide deburring bit. A few passes with a hand file. Poof! ...Instant production GM! I threw a few magazines at my gun from the next zipcode over, while blindfolded. They all went right in. On a serious note? The loads where you crash into the frame do not go any better. You still have to hit your target. The loads where you hit the opening, but weren't perfectly square and the magazines would bind up and jam as soon as the feed lips disappeared into the frame? Those go in, now. Edited February 1, 2017 by MemphisMechanic Link to comment Share on other sites More sharing options...
kneelingatlas Posted February 1, 2017 Share Posted February 1, 2017 Sweet work Evan, the wording of Appendix D4 22.4 seems a little confusing to me, did you read it first? "The longitudinal (front-to-back) dimension of the opening may be more than 1/4” greater than the corresponding dimension of a magazine. External flaring remains PROHIBITED." The way I read it you're good, but it seems like the first sentence would make more sense if it read 'The longitudinal (front-to-back) dimension of the opening may be NO more than 1/4” greater than the corresponding dimension of a magazine.' Link to comment Share on other sites More sharing options...
ryridesmotox Posted February 1, 2017 Share Posted February 1, 2017 You are pretty brave with that pneumatic grinder... Those things eat quick Link to comment Share on other sites More sharing options...
MemphisMechanic Posted February 1, 2017 Author Share Posted February 1, 2017 @kneelingatlas I got crystal-clear permission from DNROI before carving up the frame of a $900 gun: Link to comment Share on other sites More sharing options...
kneelingatlas Posted February 1, 2017 Share Posted February 1, 2017 Excellent! Link to comment Share on other sites More sharing options...
MissionaryMike Posted February 1, 2017 Share Posted February 1, 2017 Nice Job, man. Link to comment Share on other sites More sharing options...
johnbu Posted February 1, 2017 Share Posted February 1, 2017 Nice! GM card is in the mail. Link to comment Share on other sites More sharing options...
taxil343 Posted February 1, 2017 Share Posted February 1, 2017 Awesome work. I took some 120 grit sand paper to mine when I was working it over and smoothed out some of the rough machining. More of a radius like you've done may be in order. Link to comment Share on other sites More sharing options...
B_RAD Posted February 1, 2017 Share Posted February 1, 2017 You're gonna cerakote your S3? Link to comment Share on other sites More sharing options...
KrymSIX Posted February 1, 2017 Share Posted February 1, 2017 That's some pretty slick work. How long did the whole process end up taking? Link to comment Share on other sites More sharing options...
MemphisMechanic Posted February 1, 2017 Author Share Posted February 1, 2017 (edited) 8 hours ago, B_RAD said: You're gonna cerakote your S3? Yes. The frame and slide in stainless, the controls and grips in black. 4 hours ago, KrymSIX said: That's some pretty slick work. How long did the whole process end up taking? Around 10 minutes for the initial shaping, then another 20 mins perhaps with a hand file and small sanding disk to smooth it out. As mentioned above, a carbide deburring bit in an air grinder removes metal very quickly. If you're stuck with sanding drums and a Dremel or something similar? Probably an hour or two. Edited February 1, 2017 by MemphisMechanic Link to comment Share on other sites More sharing options...
homewrecker07 Posted February 1, 2017 Share Posted February 1, 2017 [emoji106] Link to comment Share on other sites More sharing options...
SCTaylor Posted February 1, 2017 Share Posted February 1, 2017 (edited) Wow looks good Memphis. Like they said, you're braver than I! Between those basepads and the funnel, it outta be like a hotdog down a hallway now. Edited February 1, 2017 by SCTaylor Link to comment Share on other sites More sharing options...
goldfish Posted February 1, 2017 Share Posted February 1, 2017 Nice work. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted February 1, 2017 Author Share Posted February 1, 2017 1 hour ago, SCTaylor said: Wow looks good Memphis. Like they said, you're braver than I! Between those basepads and the funnel, it outta be like a hotdog down a hallway now. I undersold the improvement a bit in my initial post. Let's just say that. Link to comment Share on other sites More sharing options...
waktasz Posted February 1, 2017 Share Posted February 1, 2017 (edited) I've done mine but yours looks better. Mr Dremel needs to come back out. The issue I have is the sanding drum is too fat and you can't really contour the back side very well. Need some of those ice cream cone shaped carbide bits Edited February 1, 2017 by waktasz Link to comment Share on other sites More sharing options...
johnbu Posted February 1, 2017 Share Posted February 1, 2017 see one, do one. It does help... Link to comment Share on other sites More sharing options...
waktasz Posted February 1, 2017 Share Posted February 1, 2017 Link to comment Share on other sites More sharing options...
Sniperboy Posted February 1, 2017 Share Posted February 1, 2017 (edited) Y'all are like ARE demons possessed! I love it. Thanks for taking the time to share pics and showing how its done. I can totally see a totally niche market and license to print money for machinists who can offer this service. Kind of like Grams and his barrel reaming service! Edited February 1, 2017 by Sniperboy Link to comment Share on other sites More sharing options...
Nathanb Posted February 1, 2017 Share Posted February 1, 2017 I love it but I'm not so sure my balls are big enough to do this. Link to comment Share on other sites More sharing options...
EngineerEli Posted February 1, 2017 Share Posted February 1, 2017 Interesting... I for some reason always though you couldn't do that in production, but if you got approval, you have me considering doing the same myself.... Link to comment Share on other sites More sharing options...
MemphisMechanic Posted February 1, 2017 Author Share Posted February 1, 2017 21 minutes ago, Nathanb said: I love it but I'm not so sure my balls are big enough to do this. Pay for my FFL so that people can ship me frames, and I'll gladly do yours for free? 14 minutes ago, EngineerEli said: Interesting... I for some reason always though you couldn't do that in production, but if you got approval, you have me considering doing the same myself.... Troy specifically stated opening the magwell front to rear was good to go, and that the Sevigny Speedway was legal. 1) This is the exact equivalent to a sevigny speedway for a metal frame. Just go Google what that Glock modification looks like and you'll see. 2) Opening the magwell front to rear was specifically OK'd. Since there's not really any need to do so side-to-side and all of the grinding is in front of and behind the opening, that works out great for us. Link to comment Share on other sites More sharing options...
EngineerEli Posted February 1, 2017 Share Posted February 1, 2017 OK, so the key to keep it production legal is to only open up the magwell front to back and not to touch the sides? Link to comment Share on other sites More sharing options...
SCTaylor Posted February 1, 2017 Share Posted February 1, 2017 To piggy back what Memphis said / regarding a different production gun though. My question: The rules are not clear if internal modification to the magazine well are legal, ie blending hard edges, easing the edges, etc. Attached is a photo of the extreme, but can you clarify if this would be legal? (photo omitted here) The attached photo does not alter the exterior profile, nor is it externally flared Troys Response: Internal smoothing and rounding is OK. As long as you don't alter the profile, or flare the outside of the magazine well, you're good to go. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted February 1, 2017 Author Share Posted February 1, 2017 (edited) The confusing thing has been "externally flared" used in several of these talks. I was worried that widening the mouth of the magwell was external flaring. Since... well... you're doing it to an outside surface of the gun. What is ACTUALLY considered "external flaring" is something like heating up the sides of the gun and bending them outward to form a magwell out of a previously flat frame - actually turning the bottom of the gun into a funnel shape. The profile of the gun must be unchanged. I sent DNROI a link to this topic in SIG forum showing similar modifications to what we're doing. He checked it and said that this was completely okay: Edited February 1, 2017 by MemphisMechanic Link to comment Share on other sites More sharing options...
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