BudsGunShop.com - just want to know if it is long or short action

This particular caliber gun is considered a shot action, so yes it is a short action. Hope this helps

short or long action depends on the caliber .260 is made from the .308 (.308 is a short action cartridge) so the .260 would be a short action. A 25-06 which is derived from a 30-06 (long action) would be a long action

Remington specifies this particular caliber is a "Short Action". Info : The Model 700 MAGPUL mates a M700 short action receiver with a 22″ varmint contour barrel in a MAGPUL Hunter 700 stock. This is the first production model M700 to use an AICS magazine and the first to use the MAGPUL Hunter 700 stock. Available in either 308 Winchester with a 1:10″ twist, or 260 Remington with a 1:8″ twist, the Model 700 MAGPUL also includes a Cerakote finish, tactical bolt knob, and threaded muzzle with protector.

the .260 Remington is a short action as it is based on the .308 review here buckmasters.com/Magazines/GunHunter/Articles/ID/2405/The-Unappreciated-260-Remington

Hi Joseph, It is Long action --- Remington rifles built on the Model 700 action have made their mark from the front lines of combat to the firing lines of local shooting ranges. Adding to that reputation of tactical superiority in 2017, we proudly introduce the Remington Model 700 Magpul.
Features:
Carbon steel barreled action with tactical bolt handle
Metal finished in black Cerakote
22" Heavy Free-floated barrel with 5-R rifling
Threaded muzzle with thread protector
X-Mark Pro Externally Adjustable Trigger
Breaks like glass, has virtually zero creep and offers a level shot control unmatched by any factory trigger today.
Magpul Hunter stock with aluminum bedding block
Designed to fit any shooter thanks to an adjustable length-of-pull kit and three comb-height inserts.