Professional Grade AR Upper Receiver Fixture. Robust fixture designed for years of hard use. Quick, intuitive interface that allows rapid building/rebuilding and repair of the entire upper receiver of the AR15/M16/M4 family of rifles/carbines/pistols. Designed to allow all upper receiver parts to be installed or removed without interference. Designed with rail systems in mind, the Device has clearance for most rail systems to allow installation and removal while the upper is securely held. Holds receiver from the inside via the bolt carrier raceway and charging handle raceway by way of a "T" interface. Front and rear lugs are controlled along with the entire bottom receiver flat. Compatible with milspec dimensioned receivers and billet receivers utilizing milspec internal dimensions. The Device does not contact barrel extension and is not caliber sensitive. Accurate Picatinny rail, with enumeration, allows for quick optic set-up or repair. A lanyard is provided to keep parts at-hand and help prevent dropping. An internal spring loaded detent allows for vertical application without loss of control. A2 and M4 rear sight tension spring alignment and removal is built in. Forward Assist removal channel in base. "Bolt carrier" style recesses allows Ejection Port door opening and testing.
More...
Customer ratings for THE DEVICE MANUFACTURING. MK1MOD0 DEVICE
Number of ratings: 3
From brownells.com: 3
Average rating: 4.7
Rock solid(24/12/2016)
This thing is built rock solid and has worked on all of my milspec uppers. I like the rail on the bottom that you can use for scope mounting. If you are sick of poorly made/ar blocks, or build multiple ar's a year this is for you. Only down side is the coar
MK1MOD0 Device(26/08/2017)
I have tried a ton of tools and fixtures to install barrels and rails on the M16/M4 platform. This is the best tool I have used to date. Can't wait for the SR25/AR10 version to come out. Price is high but worth it. Way better than the reaction rod. Thank you.
The Device(29/06/2018)
I got this when it was new. Before it was at Brownell's. Heard about it locally and had to check it out.There have been some minor modifications since, all for the better, but mine is still going strong. Do you want to lock an upper in and do whatever you want to with it? This is the "Device" for you. Do you want to tweak a scope? flip it over. This thing is made to last, kinda taking us back to when craftsmanship was a thing. The price is up there, but do you want to buy one, or 4 of the same thing? Comes out to be cheaper in the end. I just re-read my post, and it sounds like a plug...well it kind of is. I friggin' love this thing. It does everything it is supposed to do. Put that barrel on with something else, then use this...You will know what I mean.
Product no.: 100022745 THE DEVICE MANUFACTURING. MK1MOD0 DEVICE Mfr Part: MK1MOD0DEVICE Professional Grade AR Upper Receiver Fixture. Robust fixture designed for years of hard use. Quick, intuitive interface that allows rapid building/rebuilding and repair of the entire upper receiver of the AR15/M16/M4 family of rifles/carbines/pistols. Designed to allow all upper receiver parts to be installed or removed without interference. Designed with rail systems in mind, the Device has clearance for most rail systems to allow installation and removal while the upper is securely held. Holds receiver from the inside via the bolt carrier raceway and charging handle raceway by way of a "T" interface. Front and rear lugs are controlled along with the entire bottom receiver flat. Compatible with milspec dimensioned receivers and billet receivers utilizing milspec internal dimensions. The Device does not contact barrel extension and is not caliber sensitive. Accurate Picatinny rail, with enumeration, allows for quick optic set-up or repair. A lanyard is provided to keep parts at-hand and help prevent dropping. An internal spring loaded detent allows for vertical application without loss of control. A2 and M4 rear sight tension spring alignment and removal is built in. Forward Assist removal channel in base. "Bolt carrier" style recesses allows Ejection Port door opening and testing.
Professional grade fixture for AR15/M16/M4 upper receiver assembly/disassembly, designed for easy use and longevity.
Compatible with milspec and billet receivers, allows for installation/removal of parts without interference, and does not require caliber specific setups.
Incorporates features for optic set-up, parts retention, vertical application, and specific components like A2/M4 sights and Forward Assist.
Attributes
Colour:
Black
Finish:
Type III Andodized
Make:
AR-15
Material:
Aluminum 7075-T6
Delivery weight: 1.315kgShipping height: 25mmShipping width: 102mmShipping length: 203mm
Item details
Made in USA
Upgrade your AR-15 with the MK1MOD0 Upper Receiver Fixture! 🛠️ Built for durability and ease, perfect for repairs and builds.
Professional Grade AR Upper Receiver Fixture. Robust fixture designed for years of hard use. Quick, intuitive interface that allows rapid building/rebuilding and repair of the entire upper receiver of the AR15/M16/M4 family of rifles/carbines/pistols. Designed to allow all upper receiver parts to be installed or removed without interference. Designed with rail systems in mind, the Device has clearance for most rail systems to allow installation and removal while the upper is securely held. Holds receiver from the inside via the bolt carrier raceway and charging handle raceway by way of a "T" interface. Front and rear lugs are controlled along with the entire bottom receiver flat. Compatible with milspec dimensioned receivers and billet receivers utilizing milspec internal dimensions. The Device does not contact barrel extension and is not caliber sensitive. Accurate Picatinny rail, with enumeration, allows for quick optic set-up or repair. A lanyard is provided to keep parts at-hand and help prevent dropping. An internal spring loaded detent allows for vertical application without loss of control. A2 and M4 rear sight tension spring alignment and removal is built in. Forward Assist removal channel in base. "Bolt carrier" style recesses allows Ejection Port door opening and testing.
More...
Customer ratings for THE DEVICE MANUFACTURING. MK1MOD0 DEVICE
Number of ratings: 3
From brownells.com: 3
Average rating: 4.7
Rock solid(24/12/2016)
This thing is built rock solid and has worked on all of my milspec uppers. I like the rail on the bottom that you can use for scope mounting. If you are sick of poorly made/ar blocks, or build multiple ar's a year this is for you. Only down side is the coar
MK1MOD0 Device(26/08/2017)
I have tried a ton of tools and fixtures to install barrels and rails on the M16/M4 platform. This is the best tool I have used to date. Can't wait for the SR25/AR10 version to come out. Price is high but worth it. Way better than the reaction rod. Thank you.
The Device(29/06/2018)
I got this when it was new. Before it was at Brownell's. Heard about it locally and had to check it out.There have been some minor modifications since, all for the better, but mine is still going strong. Do you want to lock an upper in and do whatever you want to with it? This is the "Device" for you. Do you want to tweak a scope? flip it over. This thing is made to last, kinda taking us back to when craftsmanship was a thing. The price is up there, but do you want to buy one, or 4 of the same thing? Comes out to be cheaper in the end. I just re-read my post, and it sounds like a plug...well it kind of is. I friggin' love this thing. It does everything it is supposed to do. Put that barrel on with something else, then use this...You will know what I mean.