This Device is designed to sleeve a Mossberg 590 tube cap as illustrated in the photos. Swivel will need to be removed if applicable.
Please ask any questions before purchasing.
This device has an OAL of 5.355" from base to tines. (Use this dimension to determine your stand-off length)
The major OD is 1.308". The minor OD is 1.151". All dimensions are approximate.
This listing is for the Pumkin Puncher and hardware, no props are included. Props are for reference only.
This Hard Use Puncher is machined from 1144 Stressproof steel, and as such machining marks may be present on some items. The device is finished with a Black Ice specialty coating. 
What you’ll receive:
The stated device, instructions, all necessary machine screws, washers, allen screws and hex wrenches for your specific item along with a pack of VC-3 thread lock. You will need a phillips screwdriver and/or a 3/8” socket or similar. A very easy install.