JP Enterprises Enhanced Bolt Completion kit


1 in stock


Found a few JP Enhanced Bolt Completion kits in the back of the rack recently. These are the polished bolts they offered before they moved to a DLC or magnesium phosphate finish choice. I’ve got JP BCGs and bolts in all my guns and these bolts are reliable and easy to clean.

Material matters, and the Carpenter 158 steel of the standard Mil-spec bolt is suboptimal for such a high-load application leading to a life expectancy of only about 6,000 rounds. In fact, standard bolts will start to show stress cracks on the locking lugs adjacent to the extractor cut after only 3,000 rounds while cracking at the cam pin hole and weak extractor spring tension only add to the problems of the Mil-spec bolt. Fine enough for its time, the material used in these standard bolts is simply not the best choice by today’s standards.

The SAE 9310 of the JP EnhancedBolt™ is a superior steel alloy in virtually every way compared to the C-158, whether in its resistance to structural failure or life expectancy, both of which far exceeding the Mil-spec. Just as with the transmission gears for Formula 1 racers which are also made from 9310, the operational demands of a bolt assembly are ideally suited to this state-of-the-art material, with actual full-auto endurance torture tests prove it.

Beyond its material advantages, the design of the JP EnhancedBolt™ boasts many other advantages, including the addition of material around the cam pin hole to eliminate this inherent weak point of the bolt design itself. Each bolt also comes assembled with our ejector, extractor and gas rings for improvements in every subcomponent. Kit also includes our firing pin, cam pin, and firing pin retainer. Even with these advanced components, all EnhancedBolts™ are fully compatible with the readily available Mil-spec subcomponents, including a standard configuration extractor—all the benefits of a state-of-the-art proprietary platform with none of the inconvenience.


Additional information

Weight 8 oz
Select Model

.223 Carbine, .223 Rifle, .308 Rifle