Impact Precision

PROOF Research carbon fiber prefit barrels for Impact Precision actions arrive chambered and threaded for a specific action type, so the barrel you choose has to match your action model, not just your caliber. Evolved Ballistics lists these Impact Precision prefit barrels for 737R, 787, and NBK actions in a Sendero contour, with PROOF reporting up to 64 percent less weight than a steel barrel of similar contour. Browse our Impact Precision actions if you are still choosing one, or see all carbon fiber drop-in barrels for other platforms.

Impact Precision Prefit Barrel FAQs

Which Impact Precision actions do PROOF carbon fiber prefit barrels fit?

PROOF builds its carbon fiber Impact prefits for the 737R, 787R, 777R, and NBK actions, and each barrel is specific to one action type and length, so it will not swap between them. Evolved Ballistics' listings name the action in each product title, such as 737R, 787, and NBK, so match that name to your receiver before you order.

What calibers and contours do PROOF Impact Precision prefit barrels come in?

PROOF lists its carbon fiber Impact prefits in a Sendero contour with a 5/8-24 muzzle thread, in lengths from 16.5 to 24 inches and twist rates from 1:7 to 1:10. Chamberings include .223 Remington, 22 ARC, 22 Creedmoor, 6 ARC, 338 ARC, 6 Creedmoor, 25 Creedmoor, 6.5 Creedmoor, 6.5 PRC, 7 PRC, 7 Back Country, .308 Winchester, .300 Winchester Magnum, and 300 PRC. Weights run from about 2 pounds 9 ounces to 3 pounds depending on length, and the product titles on this page show which caliber and action pairings Evolved Ballistics lists.

How do I install a PROOF prefit barrel on an Impact Precision action?

PROOF describes the install as simple: torque the barrel on, verify headspace with the proper gauges, and go to the range, since the barrel arrives chambered and threaded. PROOF guarantees its shouldered prefits for headspacing but not that the barrel's engraving will line up with your stock line, because actions vary. If you would rather not check headspace yourself, a gunsmith can install the barrel for you.

What should I know about the Impact 737R before choosing a prefit?

The 737R uses a Rem 700 short action footprint with a 75 degree bolt lift, two lugs, an integral recoil lug, and a full-length 20 MOA rail, and it works with Rem 700 triggers. Impact groups chamberings by bolt face, offering .308, magnum, ARC, and .223 families, with 6.5 Creedmoor on the .308 face, 6.5 PRC on the magnum face, and 6 ARC on the ARC face as examples. Check that the prefit's cartridge belongs to the bolt face already on your action before you order.

Will a PROOF carbon fiber Impact prefit fit my stock?

Check the barrel channel first, because PROOF's carbon fiber contours can be significantly larger than factory barrels, and every carbon fiber Impact prefit PROOF lists is a Sendero contour. If your stock was inletted for a slimmer barrel, the channel may need to be opened up, which you or a gunsmith can do when the difference is small, or you may need a different stock. Evolved Ballistics' barrel selection guide explains how contour, length, and twist affect that choice.