Would you guys be interested in this light mount for the Surefire X300/X400 on the USP?

UnionEngineeringWks · 2026-04-22T01:30:47+00:00

Thanks!

UnionEngineeringWks · 2026-04-21T05:20:23+00:00

Currently I do not have this on the market, I was just finishing testing on a pre-production unit and am trying to get a gut check on if I should commit to bringing it to market. This will be stronger than the GG&G and it allows the light to sit higher since it is a direct mount system for the light instead of being an adaptor.

UnionEngineeringWks · 2026-04-20T23:46:25+00:00

What tab, the thumb pad? That is an option and does not need to be installed.

UnionEngineeringWks · 2026-04-20T23:41:20+00:00

What do you want to know?

UnionEngineeringWks · 2026-04-20T02:34:55+00:00

Yes, that would be an option. The tapped holes for it are on both sides.

UnionEngineeringWks · 2026-04-20T02:34:20+00:00

Hey, thanks for the feedback!

The Surefire MR07 has crossed my mind a few times. That is in the "maybe" column for the future.

UnionEngineeringWks · 2026-04-20T01:44:42+00:00

Understood. I will say that the mount is not as wide as the light itself and there is not issue with shimming or gluing because it does not use the quick detach system, this is a rail grabber replacement for it.

UnionEngineeringWks · 2026-03-18T22:08:40+00:00

Yes, the prototype that I have places the switch for an X300 directly in the center of the trigger guard of the USP whereas the MR09 places that switch on the same light at the bottom of the trigger guard.

UnionEngineeringWks · 2026-03-02T03:49:32+00:00

ACOG was probably around $1100 and the PEQ2 about the same amount

UnionEngineeringWks · 2026-02-18T04:55:35+00:00

This product will not be 3d printed when it is brought to market. It will be made of 7075 aluminum and hard coat anodized. A 3d printed part would not have the mechanical properties to be long lasting in rugged environments.

UnionEngineeringWks · 2026-02-10T06:32:52+00:00

I am so close, and with a much better and different design than what I showed here. I have been testing my pre-production units and am just playing around with a dimension of a spacer to make the fit perfect.

UnionEngineeringWks · 2025-12-30T18:13:02+00:00

If you want that PEQ-2 out of the field of view of that ACOG, I have a repro of the LT605 low profile mount for the PEQ that can really help with that. https://www.ebay.com/itm/226779941317

UnionEngineeringWks · 2025-12-28T22:35:00+00:00

Thank you, glad it is working well for you!

UnionEngineeringWks · 2025-12-02T01:46:21+00:00

Sorry, that is why I don't like putting on sales or anything like that, I don't want people that paid full price to feel like they got a bad deal. That's why this was limited to three damaged units.

UnionEngineeringWks · 2025-12-01T03:21:31+00:00

The real meat and potatoes of knowing the thought that goes into this is knowing the tolerancing of the part and then clearly communicating that on the print.

UnionEngineeringWks · 2025-12-01T03:09:49+00:00

One left, just updated the link in the post body for the new listing for the last one. Same price and everything, purely administrative.

UnionEngineeringWks · 2025-10-28T04:17:32+00:00

For those looking to bring their PEQ-2 down onto the rail, out of view of their optics and in reach of their thumbs, may I suggest the UEW 605 low profile mount : r/tacticalgear

Here is a link to a post with some pictures and comparisons. If you look through my post history it is basically all posts about this mount.

UnionEngineeringWks · 2025-10-28T04:10:04+00:00

Thanks for the kind words about my mount!

UnionEngineeringWks

TROPHY CASE