MODULAR AIRSOFT SUPPRESSOR V2Sound reducing suppressor with a rectangular shape and acoustic foam inside. All our pistols can be holstered with this suppressor attached. Length: 170mm 110mm 80mm SSE18 Variant has the standard airsoft 14mm CCW thread and can be used with most airsoft replicas. NOT suitable for other GBB Glocks as it will not fit into a holster. SSP18 Variant clamps onto the Thread Protector. You need the protector to attach the suppressor because it has no thread.