I'm digging around inside this pdf document here - there's already a bill to change that:
http://webcache.googleusercontent.com/search?q=cache:C1sFaG_C82YJ:search-prod.lis.state.oh.us/cm_pub_api/api/unwrap/chamber/132nd_ga/ready_for_publication/committee_docs/cmte_h_federalism_1/testimony/cmte_h_federalism_1_2018-04-17-0300_1339/ronald_lemieux_testimony.pdf+&cd=4&hl=en&ct=clnk&gl=us&client=firefox-b-1-ab
IV. Definition of a “Sawed-off Firearm,” R.C. 2923.11 (Lines 701-10)
R.C. 2923.11(F) provides that a “Sawed-off firearm means a shotgun with a barrel less than eighteen inches long, or a rifle with a barrel less than sixteen inches long, or a shotgun or rifle less than twenty-six inches long overall."
The Mossberg Shockwave has a barrel length of 14". Accordingly, with a barrel of less than 16" long, it is considered a "Sawed-off firearm" under Ohio Law. In Ohio, there is no barrel length exception, even with an overall length of 26” or greater, as Ohio does not recognize the Bureau of Alcohol, Tobacco, Firearms, and Explosive’s (“BATFE”) definition of a "Non-Regulated Shotgun" related to the manufacture and sale of Pistol Grip Only (“PGO”) shotguns.
Following BATFE regulations, if, at the factory during the manufacturing process, a brand-new receiver is fitted with a pistol grip first instead of a shoulder stock, it's considered a PGO shotgun. Due to the manufacturing process used to build the gun, it doesn't fall under the purview of NFA regulations. Instead, the definitions that apply are found in the Gun Control Act of 1968 (“GCA”). Under these regulations, the Shockwave is legally considered a “firearm,” not a sawed-off-firearm.
According to the GCA, if the overall length of that firearm, with the pistol grip and barrel installed, is greater than 26", then the barrel can legally be shorter than 18". In the case of the 14" barrel Mossberg 590 Shockwave, the Raptor bird's head grip gives the gun an overall length of 26.32". That makes it a firearm. Although the BATFE recognizes it as a "legal" shotgun, under the Ohio Revised Code, it does not meet the requirements.
This Bill provides language that mirrors federal law and provides a more uniform and useful definition of a “sawed-off firearm,” while at the same time not circumventing the actual intent of the law itself.