2C / TwoSee

2C/TwoSee is a custom machine shop in San Diego that specializes in optic-ready slide work. They don't sell firearms—they modify them. Tu, the owner, cuts slides for red dots, installs optics, and handles custom machining projects that other shops decline.

Aggressive optic mounting. 2C cuts optics lower and further back than competitor options, which means less chance of brass hitting your sight window and better co-witness with backup irons. They've done work on:

• •Glock (all generations)
• •1911s (including Staccato)
• •FN FiveSeven (world's lowest optic setup)
• •CZ Shadow 2
• •Springfield XD/XDS
• •Beretta APX
• •H&K USP
• •S&W Shield

"Tu was able to get my 509ACSS so low/deep on my G26 slide that I can still see the white on the oem Glock sights...same day turnaround!!" — VC, recent customer

• •Optic slide cuts for RMR, SRO, ACRO, Holosun, and other common platforms
• •Optic installation (in-house)
• •Direct-cut work (no mounting plate required)
• •Custom backup iron solutions
• •Barrel porting and milling work
• •Coating and finishing

Local customers: Often same-day or next-day completion. Tu has completed full jobs (cut + install + Cerakote) in under 2 hours.

Shipping customers: Text your order, they machine it, and ship it back. Most jobs turnaround within days.

By appointment only. Text first with your name and request—that's the fastest way to reach them.

Tu takes jobs other local shops turn down. He's the first and only shop doing certain APX cuts. He's engineered custom solutions (like optic irons for H&K USPs that don't normally have them). Law enforcement agencies in San Diego endorse his work. And his turnaround time is genuinely fast—not "we'll call you in two weeks" fast.