Product Overview
Picking a barrel for an AR-15 usually means working out the gas system length, gas block size and muzzle thread yourself, then installing it like a gunsmith, with a torque wrench and an armorer's wrench. With MBZ, you just choose the caliber and the length, and the kit ships complete with the barrel ready to swap.
Every MBZ Barrel Kit is built by MBZ in Evansville, Wisconsin, and ships ready to install.
6.5 Grendel 16" SPR Premium barrel, delivered with the MBZ Barrel Adapter mounted, ready to swap onto your MBZ-15 or MBZ Complete Upper Assembly.
What's in the box
- Ballistic Advantage 6.5 Grendel 16" barrel
- 1:8 twist, 416R stainless steel
- Hanson profile
- mid-length gas system
- 5/8x24 muzzle thread with A2 flash hider
- MBZ Barrel Adapter mounted
- Low-profile gas block and gas tube
- Spanner wrench.5/8x24
Runs on
Requires the 6.5 Grendel / 6mm ARC bolt assembly, sold separately. Uses 6.5 Grendel / 6mm ARC magazines.
Runs on the .441 bolt assembly and dedicated 6.5 Grendel magazines, which also feed 6mm ARC.
Your MBZ-15 or MBZ Complete Upper Assembly came with the bolt assembly for its first barrel. If that first barrel was a 5.56, a .223 Wylde, a 300 BLK or a .350 Legend, you will need the .441 bolt assembly for this kit. Keep the other one, you will want it if you go back.
How the swap goes
Take any accessories off the handguard, unscrew the handguard, loosen the Adapter with the spanner wrench and pull the bolt back slightly to unlock the barrel. Slide the new barrel in, release the bolt, snug the Adapter with the wrench and give it a light tap, then screw the handguard back on. No torque wrench, no gunsmith. Recheck the Adapter when you clean the rifle. Your optic stays on the receiver.
Good to know
This barrel kit fits the MBZ threaded upper receiver only. It does not fit a standard AR-15 upper. Estimated kit weight: 56 oz, to be confirmed once a packed kit is weighed.
