Home » Shop » Maxim Defense Industries RUGER MKIV-SD Integrally Suppressed, 22LR, 5.9″ Barrel, IV Sprsd W/optic
Home » Shop » Maxim Defense Industries RUGER MKIV-SD Integrally Suppressed, 22LR, 5.9″ Barrel, IV Sprsd W/optic
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$1,695.00Original price was: $1,695.00.$1,525.50Current price is: $1,525.50.
Out of stock
🚚 Not on our shelf today — order now to reserve yours, or call (817) 393-4000 for a current lead time. Free local pickup in Roanoke, TX when it arrives.
⚠ NFA ITEM — SUPPRESSOR Federally regulated suppressor under the National Firearms Act. BATFE Form 4, background check, $200 NFA tax stamp now $0 under OBBBA. Buyer must be 21+, US citizen, NFA-legal state. Allow 30–90 days. Western Sport handles all paperwork — call 817-393-4000.
Maxim Defense Ruger Mark IV Integrally Suppressed .22 LR Pistol — With Vortex Optic
The Maxim Defense MKIV-SD with Vortex Optic is an integrally suppressed Ruger Mark IV .22 LR pistol inspired by the legendary HK MP5SD. Maxim’s M-Kore™ Technology with a ported barrel and diffuser bleeds gas to reduce supersonic rounds to subsonic speeds — delivering an average of 114 dB with subsonic ammunition (Gemtech, per MIL-STD-1474D) and 123 dB with CCI Minimag. No detectable first-round pop. Total length: 12.6". Suppressor tube: 7" x 1" diameter (4130 steel). User-serviceable 3-piece design with integrated carbon cutters. This variant includes a Vortex Defender-ST red dot optic. 10-round capacity. Made in USA.
114 dB avg (subsonic) / 123 dB (CCI Minimag) — MIL-STD-1474D
Included Optic
Vortex Defender-ST red dot
Capacity
10 rounds
Manufacturer
Maxim Defense Industries — Made in USA
NFA Class
Suppressor — Form 4, $0 stamp (OBBBA)
About the MKIV-SD
The MKIV-SD rewrites what a .22 LR suppressed pistol can be. At 114 dB average with subsonic ammunition — below the threshold of pain — this is one of the quietest semi-automatic pistols commercially available. The ported barrel design actively reduces supersonic ammunition to subsonic, eliminating the need to source specialty subsonic loads. The Vortex Defender-ST included in this variant adds a zero-compromise red dot for fast target acquisition on this already exceptional platform.
Maxim Defense Industries is a Minnesota-based American firearm manufacturer and ISO 9001:2015 certified company. The PDX and SDX platforms were developed directly from the SOCOM PDW solicitation — designed to meet the demands of Tier 1 operators who need maximum lethality in a minimum package. Maxim Defense builds its firearms from military-grade materials: 6Al-4V titanium, 17-4 stainless steel, 7075-T6 and 6061 aluminum. Every firearm is built to order in the USA.
Frequently Asked Questions
What NFA process is required? BATFE Form 4 transfer, background check, $200 tax stamp now $0 under OBBBA. Allow 30–90 days for ATF approval.
What mount does the Maxim suppressor use? Maxim Defense suppressors use the proprietary HUB Mount system — a quick-attach interface requiring a compatible HUB muzzle device on the host.
Are Maxim Defense suppressors full-auto rated? Yes — Maxim Defense suppressors are built from military-grade materials and tested to SOCOM standards.
How to buy NFA at Western Sport? Call 817-393-4000. Roanoke TX FFL/SOT since 2007. Form 4 handled in-house. $0 stamp (OBBBA).
Why Buy From Western Sport?
Western Sport is a licensed FFL/SOT dealer in Roanoke, Texas (North Texas), FFL/SOT since 2007. We specialize in NFA transfers and handle all BATFE Form 4 paperwork in-house — so you get a smooth, guided NFA purchase experience. The $0 NFA tax stamp under OBBBA makes now the best time to buy. Call 817-393-4000 with questions.
This item is out of stock. These are on the shelf today and ship or transfer the same way. Not sure which is the right swap? Call 817-393-4000 and we will tell you straight.
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