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USP rail adapter reference pics for GG&G and MR09

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42K views 308 replies 84 participants last post by  robocorpse  
#1 ·
Hey HK people. I thought I would show you a comparison of the GG&G USP rail adapter vs the Surefire MR09 rail adapter for the H&K USP when using an X300 Surefire light.

For a long while, I just accepted that the GG&G rail was the only affordable and decent option. I used it on my USP for 6 months and just found that my hands were not big enough to really reach the switch in front of the trigger guard. I could activate it, but it was not easy to get to.

I found (and severely overpaid for) a new surefire MR09 adapter on ebay last week, and it is a much nicer mount than the GG&G, plus it moves the x300 backward enough that I can easily get to the switch with my medium sized hands.

Here is a picture comparison for those curious.

9mm USP expert with GG&G adapter and X300:
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9mm USP Expert with Surefire MR09 adapter and X300:
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9mm USP Expert with GG&G adapter and X300 with hand and activation finger length:
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9mm USP Expert with Surefire MR09 adapter and X300 with hand activation finger length:
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You can see that the MR09 tucks the light closer to the trigger guard making light activation much easier for my hand size.

I'm currently bugging Surefire to sell the CAD drawing of the adapter to me for a reproduction run of them. They have not been responsive. Should they chose not to sell me the product, I'll reverse engineer it, change it by 10% and knock it off for the community. The gray market has driven pricing into the stratosphere, and I'd like to make this an affordable option again.

Thoughts?
 
Discussion starter · #13 ·
Hey everyone-

Wanted to give an update. I have not yet found an MR08 surefire USP compact adapter to reverse engineer. I have finalized the MR09 surefire adapter however and I'm sending the CAD file out for quoting. I don't know how big the market actually is, so I'm going to start with a very small production run of only 100 units. I am toying with the idea of making 5 of them in a RAL8000 and 5 anodized in OD Green. Mostly they will be 7075 aluminum and type 3 hardcoat anodized in black.

There is no laser etching on these, so they won't look like an exact replica, but the part is dimensionally the same as the factory Surefire part.

Here is a quick CAD drawing of it. I'll update when I have lead times and pricing from the machine shop.

Image


I'm also toying with the idea of severely overpaying for a Knight's Armament MP5 optic mount and making a reproduction without the markings so we can get them for under $500 again. Any one interested in that project?
 
Discussion starter · #34 ·
Update for everyone:

I have shopped this part to 15 machine shops (all USA based, will not go overseas) and not a single one can get the costs low enough to compete with the gray market price. At the moment the lowest I can get it made, anodized, and packed for shipping is $195.00.
So my plans to expand this to MR08 is off the table (engineering costs are $5k to reverse engineer it) so I’ll make a small batch of 100 parts and call it a bust. I just want to recover my investment at this point and get out.
I’ve ordered my parts and it’s looking like March is when they will be ready. Will not be doing any colors other than black because of high costs to change colors for such a small batch.
Not the news you were all hoping for I’m sure.
 
Discussion starter · #44 ·
Hello everyone! Material is currently in and being cut and machined. Then it's off to anodizing and then to me for hardware, assembly and packaging. Looking like March to late march is the estimated shipping time. If you have not already done so, please email me directly at DeFenderAutoCo at gmail dot com so I can add you to the email wait list notification. When these are in stock I'm just going to send an email blast and open the shopping cart up. Want to make sure none of you miss your chance and get my email when they are ready.

Lots of you wanted more than one; depending on total names on the list will determine if I put a limit on how many each customer can buy.
 
Discussion starter · #46 ·
Emailed you.

Maybe worth asking, will these hold zero for a laser? GG&G's biggest flaw is that they will sag, not only does that look awful, it makes them useless. I'd like to run a VIR II IR laser for night vision shenanigans but it's a moot point if this sags as well.
No idea. I don't own a laser to test it with. I'd say if anyone has experience with an OG surefire adapter and a laser, this is expected to perform the same; meaning if it did not hold zero, this one will not either. The dimensions are essentially the same as the MR09, as the end result is the functional position the adapter puts the light in, but cosmetically it is a different look so that I can produce it as a new design. The only item I cannot change is the profile of the USP rail interface, as it is required for fitment. The rest of the mount was updated to be aesthetically pleasing and to pay tribute to the OG look.

I think the 3pc design, 6000 series aluminum, and the wearing of the locating dowels/sockets make the GG&G sag over time. This MR09 reimagining is 7075, and a 2pc design that seems to be much more rigid without much visible flex. It is also why it is so expensive to produce; it has complex geometry that needs a 7 axis mill to complete which adds cost and then needs to mate perfectly with a separate end cap that also fits the rail precisely. It's a bitch of a part but a damn nice flashlight holder thingy.

Please HK, just make a new mold and add a single rail slot to a 1913 standard. It would still look nearly identical but would bring it into 2024. Also add optic cuts, kthxbye.

I'd advise you to test yours and report back should you choose to invest in this one. I hope it meets standard.
 
Discussion starter · #52 ·
Wanted to give some of you that emailed me a different look at the CAD model of the part as it seems lasers are a big deal (mini MK23 builds I'm guessing).

The concern you all raised was the drooping of the GG&G mount. This design is a 2 pc vs the GG&G's 3 pc and as such looks like it would be much more rigid. The softer 6061 aluminum that the GG&G is made out of allows the dowels and pins to have a bit of give beyond the tolerance that is required for assembly. The 7075 aluminum the new mount is being made of is much harder and doesn't give as much.

I can't say you won't need to monitor and confirm zero until you feel it is proven, but I'll bet once set and left, it holds pretty damn close.

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The part has so many curved surfaces at angles 180 from each other, that this part requires a 7 axis CNC mill to manufacture them. The GG&G being a 3pc can go on a standard mill and get ripped out en mass and on the cheap.

All who have emailed me are on the in stock notification list that will go out from mailchimp once they are on my shopping cart. I'll post here after they are live.
 
Discussion starter · #66 ·
Gents-

Do not ask to be added to the waitlist in this thread as you won’t get on it here.

You need to send me an email to DeFenderAutoCo at gmail dot com to be on the in-stock notification list.

It will go out to email address via mailchimp.
 
Discussion starter · #68 ·
Will these be coming soon? Trying to monitor my email so I don't miss anything to a spam filter.
Hoping this month I'll be shipping everything. All the stainless hardware and padded mailers/baggies showed up on Friday, so once they arrive it will take me 1 day to assemble and package all 100 of them. The adapter is 2 parts; the big main part is on the last machining operation this week, then they start on all the little side pieces. From there they need to go to bead blasting, then to get the type 3 hardcoat anodizing in black, then shipped to me for assembly and packaging/shipping.

To make sure everyone has fair warning, I think the fair thing will be to post here that they arrived, then send an email out that gives the time/date that the shopping cart will go live, then send another once it live. Basically a 24-48 hour heads up notice first before opening the cart up.

I know lots of you wanted multiple, so if these sell out instantly I'll re-order another 100 that I can sell over the next year or so. The wait list exceeds the amount available, but after having 700 'buyers' for my John Wick compensator at launch, only about 60 of them pulled the trigger come game day.

I anticipate that once word gets out there is knock off MR09s again, the demand will increase. Only takes 5-8 weeks to get another batch so I'll continue to make them if the demand remains.

As always, I cannot stress enough how much I appreciate the board members and HKPROs support on my projects. I love HK and the community here is second to none.
 
Discussion starter · #75 · (Edited)
Got your confirmation, have the emails gone out yet? Been screening my spam filter hoping I didn't miss it. Thanks!
Not yet. Last small parts in last operation on the mill. Then off to bead blast and anodizing. We are nearing the finish line.
 
Discussion starter · #76 ·
Machine shop confirms all parts are finished with machining operations. Off to bead blast then to the anodizing area as of this morning.

I’ll post here once they are assembled and ready for shipment. Then you will have a day to prep and I’ll open the shopping cart up and send out the notifications to all on the list.
 
Discussion starter · #80 ·
Talked to machine shop this morning. Parts were delayed at the anodizing shop. They will be finished around Thursday of next week and then sent directly to me.
mill update when they ship, when they arrive, when they are ready (24 hr notice) and when they are in the shopping cart.
the 8 week estimate was wayyyyy off.
 
Discussion starter · #84 ·
Parts shipped to me this morning from anodizing shop. Should arrive Monday! Will likely open up the cart for purchases on Friday May 24!

it’s been a long journey, and I appreciate all the patience in getting them perfect. Hope they satisfy.
 
Discussion starter · #85 ·
I travel out of state for work M-F every week, so while I have not seen the parts, my wife confirmed they did arrive on Tuesday.
I’ll be sending the email notifications out tonight, and the cart will open up tomorrow morning at 9am pacific time.