JinMing JM Gen8 Nylon Gearbox Shell Type:for old gen8 (with full auto) it's compatible with AR15

it's compatible with AR15

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Its compact size of 10

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JinMing JM Gen8 Nylon Gearbox Shell Type:for old gen8 (with full auto) it's compatible with AR15This jm gen8 gearbox shells is compatible with for the new verison JinMing J8 M4A1 gel blaster with semi auto fire modes or the older verions which is only with full auto shooting mode. Specifications: Brand: JM. Material: nylon. Color: black. Compatibility: new or old jm j8 gel blaster. SIze: 20*8*2cm. Weight: 85g. Package Contents: 1x jinming gen8 gearbox shell. 1x nylon t piece. 1x motor holder. 1x spring retainer.