Drops on Glock 43 and Glock 43X frames — single-stack 9mm. Built up and ready to install on a stripped factory or P80 frame. Combat-style front and rear serrations for positive grip, a top window cut for visual flair and slight weight reduction, and an RMSc-pattern optic cut for Shield RMSc, Holosun K-series (407K / 507K), and other RMSc-footprint micro red dots.

What's installed:

• Black combat slide — RMSc optic cut + top window cut
• Black nitride 9mm replacement barrel for Glock 43 / 43X
• 3CR Tactical slide completion kit (firing pin assembly, extractor, recoil rod)
• Polymer tall (suppressor-height) sights installed — co-witness compatible with most RMSc red dots

Specs:

• Fit: Glock 43 and Glock 43X frames (9mm single-stack)
• Serrations: Combat — front and rear
• Optic cut: RMSc footprint — flat cut, no locating bosses
• Sight cut: Glock-pattern dovetails
• Sights: Polymer tall (suppressor height) — co-witness compatible
• Barrel: 9mm black nitride, drop-in Glock 43 pattern
• Top: Window cut (decorative)

Verify your barrel is a Glock 43 pattern before assembly (Glock 43 and 43X share barrel dimensions). Cycle the slide on the frame 200+ times before live fire to seat the rails. The RMSc cut is machined flat with no locating bosses, so torque the optic's mounting screws to manufacturer spec and use a recoil-grade thread locker — the screws and locker carry the load that posts otherwise would.

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