Jp Enterprise197557618
J P Enterprises Ar .308 .750 Jam Nut 5/8-24'' Steel Black$14.99
Availability: In Stock
The JP Enterprises AR-15 .750 jam nut in 1/2-28 threads is a precision steel component built to lock down your muzzle device exactly where it needs to be. If you're running a suppressor, muzzle brake, or flash hider on an AR platform rifle, a quality jam nut keeps that device indexed and stationary under recoil and shot cycling. JP Enterprises has earned respect in the AR community for attention to detail, and this jam nut reflects that standard: it's made from steel in a black finish that resists corrosion and pairs cleanly with most modern setups.
Proper muzzle device indexing matters whether you're dialing in a precision rig for long-range hunting, running duties, or just keeping your brake or suppressor exactly how you mounted it. A loose muzzle device can shift zero, create sound inconsistencies, or damage threads. This .750-inch jam nut threads onto 1/2-28 pitch barrels (the standard on most AR-15s) and seats against your muzzle device to lock it in place. The hex profile gives you positive wrench contact for controlled torque without rounding.
Steel construction and black finish are the practical choices for a working part. You get durability and a look that blends into any build without fuss. Whether you're assembling an upper from scratch or replacing a worn jam nut, JP Enterprises' offering is straightforward, reliable hardware from a maker that understands what shooters actually demand.
| Brand | JP Enterprises |
| Thread Pitch | 1/2-28 |
| Diameter | .750 inch |
| Material | Steel |
| Finish | Black |
| Compatibility | AR-15 platforms with 1/2-28 muzzle threads |
This jam nut threads onto your AR-15 barrel's 1/2-28 muzzle threads and locks against your installed muzzle device (suppressor, brake, flash hider, etc.) to prevent it from loosening or shifting under recoil.
Yes, if your AR-15 has a barrel with 1/2-28 muzzle threads—the industry standard for .223/5.56 AR-15s. Check your barrel specs or existing muzzle device to confirm thread pitch before ordering.
A jam nut adds security and prevents your device from creeping loose during use. If your device is already indexed and you want it to stay put, a jam nut is a worthwhile addition.
You'll need a wrench or socket that fits the hex profile of the jam nut, and likely a second wrench to hold the muzzle device steady while you tighten. Some builders use roll pins or set screws in addition to or instead of jam nuts for added security.
SKU: 197557611 • Weight: 0.01oz
Availability: In Stock
The JP Enterprises AR-15 .750 jam nut in 1/2-28 threads is a precision steel component built to lock down your muzzle device exactly where it needs to be. If you're running a suppressor, muzzle brake, or flash hider on an AR platform rifle, a quality jam nut keeps that device indexed and stationary under recoil and shot cycling. JP Enterprises has earned respect in the AR community for attention to detail, and this jam nut reflects that standard: it's made from steel in a black finish that resists corrosion and pairs cleanly with most modern setups.
Proper muzzle device indexing matters whether you're dialing in a precision rig for long-range hunting, running duties, or just keeping your brake or suppressor exactly how you mounted it. A loose muzzle device can shift zero, create sound inconsistencies, or damage threads. This .750-inch jam nut threads onto 1/2-28 pitch barrels (the standard on most AR-15s) and seats against your muzzle device to lock it in place. The hex profile gives you positive wrench contact for controlled torque without rounding.
Steel construction and black finish are the practical choices for a working part. You get durability and a look that blends into any build without fuss. Whether you're assembling an upper from scratch or replacing a worn jam nut, JP Enterprises' offering is straightforward, reliable hardware from a maker that understands what shooters actually demand.
| Brand | JP Enterprises |
| Thread Pitch | 1/2-28 |
| Diameter | .750 inch |
| Material | Steel |
| Finish | Black |
| Compatibility | AR-15 platforms with 1/2-28 muzzle threads |
This jam nut threads onto your AR-15 barrel's 1/2-28 muzzle threads and locks against your installed muzzle device (suppressor, brake, flash hider, etc.) to prevent it from loosening or shifting under recoil.
Yes, if your AR-15 has a barrel with 1/2-28 muzzle threads—the industry standard for .223/5.56 AR-15s. Check your barrel specs or existing muzzle device to confirm thread pitch before ordering.
A jam nut adds security and prevents your device from creeping loose during use. If your device is already indexed and you want it to stay put, a jam nut is a worthwhile addition.
You'll need a wrench or socket that fits the hex profile of the jam nut, and likely a second wrench to hold the muzzle device steady while you tighten. Some builders use roll pins or set screws in addition to or instead of jam nuts for added security.
SKU: 197557611 • Weight: 0.01oz