Jeidanten shows the VFC/Umarex HK M110A1 CSASS GBB that they carry. This is an airsoft replica of the US military-adopted HK M110A1 CSASS /SDMR. Officially authorized by H&K (Umarex), it features a Geissele M110A1 SMR M-LOK handguard, 45-degree folding mechanical sights, and detailed gun body simulation. The replica includes original QD mounting points, a double-sided fire control design, and an HK E1-type retractable buttstock. For optimal performance, it incorporates a Guide-HOP quick HOP-UP adjustment system, a strengthened HK417/G28 bolt set, and a reinforced buffer and recoil spring.