OSA Premium Upper Parts Kit OSA Premium Upper Parts Kit (UPK) The OSA Premium Upper Parts Kit includes the highest-quality components needed to complete your AR-15 upper receiver. Manufactured in the USA by Forward Controls... MSRP: Was: Now: $125.00 Choose Options
OSA Basic Upper Parts Kit OSA Basic Upper Parts Kit The OSA Basic U MSRP: Was: Now: $25.00 Add to Cart
