Yondering Posted August 26, 2019 Share Posted August 26, 2019 14 hours ago, tbarker13 said: Are the MOS plates aluminum? That could make a difference. No, they are steel, but they aren't very thick so there's not a lot of thread engagement. The threaded holes in a milled slide are deeper, and when done right the optic is secured by the milled pocket and the screws only keep it from coming out vertically, rather than taking up the shear loads. Whether the MOS system is "good enough" is debatable and probably depends on the application, but I think there's no question that a milled slide is more secure, when it's done right. I base that on my career in durability testing as well as being a machinist, and putting my own milled/RMR Glocks through a lot of abuse in the dojo, training classes, and practice. Link to comment Share on other sites More sharing options...
tbarker13 Posted August 26, 2019 Share Posted August 26, 2019 (edited) 1 hour ago, Yondering said: No, they are steel, but they aren't very thick so there's not a lot of thread engagement. The threaded holes in a milled slide are deeper, and when done right the optic is secured by the milled pocket and the screws only keep it from coming out vertically, rather than taking up the shear loads. Whether the MOS system is "good enough" is debatable and probably depends on the application, but I think there's no question that a milled slide is more secure, when it's done right. I base that on my career in durability testing as well as being a machinist, and putting my own milled/RMR Glocks through a lot of abuse in the dojo, training classes, and practice. I don't doubt it, based on my own experience of overtightening screws in an aluminum plate on my CZ. Wasn't paying close enough attention and managed to strip the screw holes. Found out the hard way when the optic flew off the gun during a stage run. Edited August 26, 2019 by tbarker13 Link to comment Share on other sites More sharing options...
Yondering Posted August 26, 2019 Share Posted August 26, 2019 Ooh, that's a bummer! I picked up a Canik TP9SFx a few months ago; that one has aluminum mounting plates as well, but they're fairly thick and have steel thread inserts. I haven't mounted an optic on that one but the plate design looks better for screw retention than the MOS system. Those inserts (basically a Helicoil) may be a solution for your CZ plate? Link to comment Share on other sites More sharing options...
Mcfoto Posted August 26, 2019 Share Posted August 26, 2019 When I was at my annual GSSF match this summer, I overheard the armorer tell someone the number one issue with mounting optics to the MOS is *over-tightening* the mounting screws. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted August 26, 2019 Share Posted August 26, 2019 On 8/25/2019 at 12:55 PM, 11MM said: Sheepdog, Honest question, how does milling keep the threads from stripping? If your machinist is good, the optic is press-fit into the slide. There is no gap at all. My PPQ has a .001” interference fit. As the gun recoils the screws/dowels with a plate type setup are the only things holding the optic into place. With a milled slide it’s more like an iron sight pressed into it’s dovetail. Anecdotally, optics have been said to last longer with a properly milled slide. I have 5-6,000+ on a DPP, which is well above where many of them have failed Link to comment Share on other sites More sharing options...
bigtimelarry Posted August 27, 2019 Share Posted August 27, 2019 Yeah, but what about all the guys that say it sits lower in the slide... what, like a 1/4 inch.. LOL.. Link to comment Share on other sites More sharing options...
Yondering Posted August 27, 2019 Share Posted August 27, 2019 6 minutes ago, bigtimelarry said: Yeah, but what about all the guys that say it sits lower in the slide... what, like a 1/4 inch.. LOL.. What about it? That’s not the only reason (or even the most important) to do a milled slide but it is one advantage. Link to comment Share on other sites More sharing options...
tbarker13 Posted August 27, 2019 Share Posted August 27, 2019 12 hours ago, Yondering said: What about it? That’s not the only reason (or even the most important) to do a milled slide but it is one advantage. Exactly. Might not be a huge difference. But there is a difference. Link to comment Share on other sites More sharing options...
B_RAD Posted August 27, 2019 Share Posted August 27, 2019 24 minutes ago, tbarker13 said: Exactly. Might not be a huge difference. But there is a difference. Is that an advantage? I doubt it. Link to comment Share on other sites More sharing options...
tbarker13 Posted August 27, 2019 Share Posted August 27, 2019 2 hours ago, B_RAD said: Is that an advantage? I doubt it. At some point, being closer to the slide is an advantage. I don't know what that point is. On my G19, with co-witnessed sights, I think it makes a difference. Link to comment Share on other sites More sharing options...
Honeybooboo Posted August 27, 2019 Share Posted August 27, 2019 Milled is better. Less wear on the optic, better presentation, more natural sight alignment or whatever you want to call it. There aren’t 100 dots out there to be switching around all the time. Pick one you like and get the slide milled. Link to comment Share on other sites More sharing options...
tdp88 Posted August 27, 2019 Share Posted August 27, 2019 2 minutes ago, Honeybooboo said: Milled is better. Less wear on the optic, better presentation, more natural sight alignment or whatever you want to call it. There aren’t 100 dots out there to be switching around all the time. Pick one you like and get the slide milled. What am I supposed to do when a cool new dot comes out? Link to comment Share on other sites More sharing options...
tbarker13 Posted August 27, 2019 Share Posted August 27, 2019 7 minutes ago, tdp88 said: What am I supposed to do when a cool new dot comes out? That's an excuse to buy another slide - or gun. Link to comment Share on other sites More sharing options...
Darqusoull13 Posted August 27, 2019 Share Posted August 27, 2019 7 minutes ago, tdp88 said: What am I supposed to do when a cool new dot comes out? Sell the old assembly and buy a new one. Clearly the new gear is going to increase gains far more than any amount of practice with outdated gear. Milled is a more solid mounting system and way more importantly aesthetically pleasing to me. You want to look good when you're shooting, right? Link to comment Share on other sites More sharing options...
tdp88 Posted August 27, 2019 Share Posted August 27, 2019 3 minutes ago, Darqusoull13 said: You want to look good when you're shooting, right? Wishful dreaming. Link to comment Share on other sites More sharing options...
Cuz Posted November 12, 2020 Share Posted November 12, 2020 Yeah, I know this is an old thread, but now it concerns me, so it's time to revive it. I have a G41 slide I want to put an optic on. But, I'm not 100% sure which optic just yet. Is there anyone out there milling a Glock slide for a plate system like the MOS? Also, who are the preferred sources these days to get a slide milled? Thanks all. Link to comment Share on other sites More sharing options...
Paul49 Posted December 13, 2020 Share Posted December 13, 2020 On 11/12/2020 at 2:30 PM, Cuz said: Yeah, I know this is an old thread, but now it concerns me, so it's time to revive it. I have a G41 slide I want to put an optic on. But, I'm not 100% sure which optic just yet. Is there anyone out there milling a Glock slide for a plate system like the MOS? Also, who are the preferred sources these days to get a slide milled? Thanks all. I am currently looking at the Agency Optic System or AOS for my G19. Thinking about getting a G19 Gen 3 slide milled by them while retaining pristine the OEM slide with matching numbers. There must be someone out there who has already gone the AOS cut route who could comment. http://www.agencyarms.com/optic-cuts Link to comment Share on other sites More sharing options...
SGT_Schultz Posted December 13, 2020 Share Posted December 13, 2020 (edited) deleted Edited December 13, 2020 by SGT_Schultz Link to comment Share on other sites More sharing options...
SGT_Schultz Posted December 13, 2020 Share Posted December 13, 2020 48 minutes ago, Paul49 said: I am currently looking at the Agency Optic System or AOS for my G19. Thinking about getting a G19 Gen 3 slide milled by them while retaining pristine the OEM slide with matching numbers. There must be someone out there who has already gone the AOS cut route who could comment. http://www.agencyarms.com/optic-cuts Just by looking at it, I'd send my pistol without hesitation if I had a Glock. It looks to be very well thought out and even better than CZ's OEM plate system which is about the best I've seen so far. I think there's several threads with user reports in pistol-forum.com Link to comment Share on other sites More sharing options...
Gary1911A1 Posted December 13, 2020 Share Posted December 13, 2020 I think Glock should either buy or license the Shadow System method of mounting an Optic. Maybe they could even call it Gen 6. Link to comment Share on other sites More sharing options...
sdrr72 Posted December 13, 2020 Share Posted December 13, 2020 Sent my slide to Primary Machine and Tool here in La. They did a great job with both the milling and the refinishing. Link to comment Share on other sites More sharing options...
NMBOpen Posted December 13, 2020 Share Posted December 13, 2020 8 minutes ago, sdrr72 said: Sent my slide to Primary Machine and Tool here in La. They did a great job with both the milling and the refinishing. My G21 is there now for DPP milling and nitride refinish. Link to comment Share on other sites More sharing options...
Chutist Posted December 24, 2020 Share Posted December 24, 2020 I get it if you already have the gun and want to add the optic... But otherwise I can't see passing on a factory setup. Liked the 17 MOS so much I bought a 34 MOS yesterday! The MOS plates work well and if I decided to sell it, MOS has better resale value than a non-factory cut slide! Link to comment Share on other sites More sharing options...
ARac40 Posted December 25, 2020 Share Posted December 25, 2020 another option is go with the mos, but get an aftermarket plate. This is what I have and their explanation below. Forgive me, but I’m not able to post the hyperlink... The CHPWS V4 Series of adapter plates has evolved over the past five years because the OEM mounting plates are the weakest link in the Red Dot System. The new MIL/LEO V4 Series addresses the mounting hardware while retaining our industry leading thread engagement. All new V4 plates will feature our Patent Pending replaceable stainless steel T-Nuts and stainless steel Torx® head screws which are used to mount the RDS (Red Dot System) to the V4 plate giving you the ability to replace the mounting hardware without replacing the entire plate. The V4 Series retains it’s industry leading six to seven full revolutions of thread engagement for maximum retention. The secret to retaining MRDS’s on pistols is not the material a plate is made from – IT’S THREAD ENGAGEMENT!!! Link to comment Share on other sites More sharing options...
Robertwil18 Posted December 25, 2020 Share Posted December 25, 2020 The Agency AOS system is one of the absolute best and most secure and modular optic mounting cuts/platforms around right now. The only downside is the lead time. Link to comment Share on other sites More sharing options...
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