UTG PRO SD Monolithic M-LOK Handguard for MP5K UTG PRO SD Monolithic M-LOK handguard for the MP5K, features an extended 4.2" length cylindrical handguard compatible with most K-length suppressors and up and a two-inch inner diameter that provides the necessary space for M-LOK hardware to clear suppressors, provides improved handhold and M-LOK real estate, monolithic design combines M-LOK and optics real estate into one, claw mount locking interface, designed for the 9mm receiver MP5K and clones Proudly Designed and Made in USA. Extended 4.2" length cylindrical handguard compatible with most K-length suppressors and up. Two-inch inner diameter provides the necessary space required for M-LOK hardware to clear most bare or wrapped suppressors and improves heat dissipation. Improved handhold and M-LOK real estate. Monolithic design combines M-LOK and optics real estate into one. Extended picatinny flat-top with cutout for serial number identification. Enlarged and chamfered charging handle recess. Claw mount locking interface. Designed for 9mm receiver MP5K and clones.