FEATURES-Caliber: 6.5 Grendel-Profile: light-Length: 16"-Gas placement: intermediate-Low profile gas block-Rifling: button 1:8" twist-Made from 416R stainless steel-Hand-lapped-M4 feed ramps-5/8-24 threading-SAAMI spec chamber-1" MOA guaranteed-.750 gas block included-Bolt carrier group included- type 2 6/5 Grendel bolt face-Intermediate gas tube includedPRODUCT SPECIFICATIONS:Dimension 3.50 X 3.50 X 18.25Height 3.5000Width 3.5000Length 18.2500AR-15 ACCESSORY YCALIBER 6.5 GRENDELFINISH STAINLESSLENGTH IN INCHES 16.0000SIGHTS NFLUTED NOTHER FEATURES: INTERMEDIATE LENGTH GAS PLACEMENT (BETWEEN MID-LENGTH AND RIFLE LENGTH), LIGHT PROFILE, 6.5 GRENDEL BOLT CARRIER, INCLUDES TUNABLE LOW PROFILE GAS BLOCKNO DIRECT SHIP TO CALIFORNIA