* Our 10.3″ Crane Spec AR15 upper features the ideal gas port sizing (.070) to achieve minimal gas blowback when ran suppressed. This unit is specifically designed to be ran in conjunction with a silencer.
* We do not guarantee reliable cycling with some manufactures ammunition without the addition of a silencer.
It is the customer’s responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16″. Federal NFA regulations are applicable to this item.
Handling firearms or firearms parts can expose you to lead, and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).
Additional information
CRANE SPEC
STANDARD GAS PORT, CRANE SPEC GAS PORTING
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