The Strike Industries Mass Driver Compensator (MDC) for Glock 17 Gen 1-3 is a slide-mounted recoil-management device that does not require a threaded barrel. Inspired by mass-driver physics — forward propulsion from mass ejection — the MDC counters muzzle flip without permanently modifying your pistol. Install is reversible, the host slide stays stock, and there is no NFA paperwork because the compensator is not a suppressor and not a brake.

Features:

• Fits: Glock 17 Gen 1-3 (does not fit Gen 4/5 or G19)
• No threaded barrel required — drops onto the stock slide
• 50-state legal — not regulated as a suppressor or NFA item
• Widened bore reduces baffle strikes and keyholing on out-of-round rounds
• 2.5mm relief cut at the rear of the comp protects the slide face from gas-cutting
• No permanent modification to the host pistol

Break-in: shoot 50–100 rounds of standard-pressure 9mm to fully seat the comp; monitor for any baffle contact during the first range trip and recheck the mounting fasteners. See our slide break-in guide for the full procedure.

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