the Hopup Chamber MI Pro unit is specially designed with BB Latching System to prevent dropping BBs after removing the magazine

Since 1972 Umarex has created a world of adventure for sport shooters

12G BBS (NOT RECOMMENDED FOR USE WITH 0

as well as a precise rotary Hop-Up chamber

The inner diameter is 6

Monk Customs 7" Carbon Fiber Outer Barrel (Gloss Black) lancer the Hopup Chamber MI ProThe Monk outer barrels are build for super lightweight set ups! By using nylon and carbon fiber the 7 outer barrel is the most lightweight outer barrel on the market today. This outer barrel is compatible with the M4 series. . Deck out your custom gun today with the newest aftermarket accessories in the game! Let's Get It!