Based on the supremely popular 737R and Short Action NBK, the Impact Medium Action NBK brings you everything you love about Impact's flagship 737R in a lighter weight setup ideal for your next hunting rifle. The Impact Medium Action NBK utilizes the same barrel tenon/headspace specs as the 737R and can readily accept 737R pre-fit barrels. 

Some of the features of the Medium Action NBK include:

• The one-piece bolt is designed with proper geometry and clearance to allow smooth operation under field conditions.
• Fluting on the top and sides of bolt body carry dirt away while a smooth bottom portion ensures smooth cycling.
• Black carbon nitride finish improves operation by increasing surface hardness and lubricity.
• EDM Cut Raceway
• Hardened and finish machined steel action body
• Features a 75 Degree, two lug design, and interchangeable bolt knobs 
• Available in .308 & Magnum bolt faces, and accepts Rem 700 triggers
• Will feed up to ??? oal rounds, & is cut for AICS and Hawkins hunter mags
• Uses 1-1/16 x 16 TPI Class 3 tenon threads, and weighs 32 ounces
• Trigger Hanger allows simplified field maintenance to the trigger
• The length of the front pic rail is 1.865 and 1.765 for the rear
• Has a 20 MOA, split integral rail, and integral recoil lug 
• Distance from center to center of action screws is 6.850
• Has a .700 Diameter bolt, with a Mini M16 extractor
• This Action will NOT work with BDL style hardware
• The Impact Medium Action NBK is 1520.00

If the action you want is not in stock, one of our dealers may have it in stock.  Please visit our Dealer Page here:  Impact Precision Dealers