Constructed with a metal frame for durability

Strong and yet lightweight Fiber reinforced molded polymer housing

The inner space diameter of the Thor is 28mm x 73

Hop-up Chamber: Metal / Adjustable

COLOR: ACU / BLACK / CAMO / OD / TAN

Sentinel Gears 2500rd M4 Auto-Winding Electric Drum C-Mag Magazine Handguard Constructed with a metal frameSPECIFICATIONS MATERIAL: NYLON POLYMER CAPACITY: 2,500 ROUNDS CALIBER: 6 MM COMPATIBILITY: MOST M4 AND M16 AEGS COLOR: BLACK MANUFACTURER: SENTINEL GEARS FEATURES DURABLE LIGHTWEIGHT POLYMER CONSTRUCTION SOUND CONTROLLED AUTO WINDING TECHNOLOGY. HIGH CAPACITY MAGAZINE HOLDS 2,500 ROUNDS OF BBS. C MAGAZINE DESIGN. COMPATIBLE WITH MOST M4 M16 AEGS