--- title: "Strategic Sciences Black MFMD 1.3 OTB Suppressor" description: "Black 5.56/.223 suppressor with 1/2×28 direct threading, 1.3\" OTB clearance requirement, shims, and installation tool included." canonical_url: "https://www.kygunco.com/product/strategic-sciences-md-muzzle-device-only-1.3-otb-5.56-black-1-2x28-suppressor-black" meta: author: KYGUNCO "og:description": "Black 5.56/.223 suppressor with 1/2×28 direct threading, 1.3\" OTB clearance requirement, shims, and installation tool included." "og:image": "https://cdn.kygunco.com/assets/products/304710/thumbnail.jpg?v=1773752874" "og:image:height": "500" "og:image:width": "500" "og:title": "Strategic Sciences Black MFMD 1.3 OTB Suppressor" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Guns](https://www.kygunco.com/category/shooting/guns) / [Class III](https://www.kygunco.com/category/shooting/guns/class-iii) / [Suppressors](https://www.kygunco.com/category/shooting/guns/class-iii/suppressors) / STR-MFMD-5.56-1.3-MD-1/2X28-BK ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/304710/main.jpg?v=1773752874) For illustration purposes only, this image may not be an exact representation of the product. # STRATEGIC SCIENCES MFMD 1.3 OTB 5.56 Black 1/2X28 Suppressor - Black The Strategic Sciences MFMD-MD is a black, NFA-regulated suppressor for 5.56/.223 rifles with 1/2×28 threads. Its direct-thread, flush-mount design requires 1.3" of clearance over the barrel from the shoulder to the first obstruction. A shim set and installation tool are included. See Price In Cart ** 5 interest-free payments of **$308.80** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** NFA / Class 3 NFA transfer requirements vary by product and location. Additional documentation, approvals, or a qualified dealer may be required. Check local and state regulations to ensure eligibility and compliance before purchasing. ** Ships To FFL Dealer Handled by our expert shippers in Bardstown, KY. ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Item # 304710 Style STR-MFMD-5.56-1.3-MD-1/2X28-BK UPC 850083783167 Condition New Manufacturer [Strategic Sciences](https://www.kygunco.com/brand/strategic-sciences) Model MFMD Caliber 5.56 NATO Weight 2 lb Action Silencer The MFMD-MD is an NFA-regulated, hearing-safe suppressor built as a standalone muzzle device for 5.56/.223 rifles using a 1/2×28 thread pattern. Engineered to deliver extreme signature and recoil reduction without the SD or SDX modules, it offers a compact, flush-mount form that installs directly to the barrel using the included shim set and tool—no adapters required. Fitment is straightforward: the system requires 1.3" of over-the-barrel clearance measured from the barrel shoulder to the first obstruction. If the clearance isn’t available, the device will not seat properly. Once installed, the MFMD-MD provides dramatic reductions in flash, at-ear sound, and rearward recoil force while maintaining consistent bolt velocity, offering a measurable performance upgrade in a minimal footprint. FEATURES - Caliber Compatibility: 5.56 / .223 - Thread Pattern: 1/2×28 - Device Type: NFA-regulated muzzle device (MD only) - Mounting Method: Direct thread - Tools Included: Shims + installation tool - OTB Clearance Requirement: 1.3" from barrel shoulder - Flash Reduction: \~98% vs. baseline flash hider - Sound Reduction: \~23 dB at right ear vs. baseline - Rearward Recoil Reduction: \~63% vs. baseline - Bolt Velocity Change: ±2% (no meaningful deviation) ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). ## Watch The Product In Action ## Frequently Bought Together 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Don't Forget Your Ammo ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/strategic-sciences-md-muzzle-device-only-1.3-otb-5.56-black-1-2x28-suppressor-black#webpage","@type":"WebPage","description":"Black 5.56/.223 suppressor with 1/2×28 direct threading, 1.3\" OTB clearance requirement, shims, and installation tool included.","name":"Strategic Sciences Black MFMD 1.3 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