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please Contact TNW firearms for a accurate answer TNW Firearms Contact PO BOX 311 Vernonia, OR 97064 Phone: 503-429-5001 Fax: 503-429-3505 Email Us Sales: Sales@tnwfirearms.com Tech Support: Tech@tnwfirearms.com

Hi Todd and welcome. One would need a serial number to determine directly with TNW Firearms as Model and UPC won't be much help. It likely does but, whether it does or does not, the UB is easy to install is not: https://www.tnwfirearms.com/product-p/asrx-gp02-xxxx-xxxx-xx00.htm ----------------------- Cheers, stay safe and enjoy!