AR15 16″ MLOK Build Kit w/Files
AR15 Rifle build kit includes parts necessary to complete the U-Bolt Vanguard 3D Printable AR15 Lower Receiver by Ivan the Troll. AR15 16” 5.56 carbine gas upper features MLok 13.5” handguard and includes charging-handle, bolt carrier group, lower parts kit, Magpul stock, and USB drive with printable file.
Does not ship to NJ, WA, or internationally.
1-2 week lead time due to high order volume.
* Does NOT contain U-bolt
Note: your jurisdiction may require you to be a licensed FFL or licensed gunsmith to purchase this product.
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Material | 4150 CMV
Caliber | 5.56 NATO
Twist | 1:7
Length | 16"
Gas System | Carbine
Finish | Nitride
Thread | 1/2-28
Extension | M4
7075-T6 Forged Aluminum
Type III Hard Coat Anodizing
Assembled with Forward Assist and Dust Cover
M4 Feed Ramps
Magpul MBUS flip-up sights NOT INCLUDED
13.5 M-lok Rail
Bolt Carrier Group
Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside
Lower Parts Kit
Lower build kit with everything you need to assemble your AR-15 lower. Features Enhanced Polished Trigger (EPT)
Safety Selector | Detent | Spring
Magazine Catch | Button | Spring
Bolt Catch | Buffer | Spring
Bolt Catch Buffer
Takedown | Pivot Pins | Springs  | Detents 
Buffer Retainer Pin | Spring
Magpul MOE Grip | Trigger guard
7075 mil-spec carbine receiver extension
Standard Carbine Buffer
Carbine Length Spring
16" 4150 CMV
5.56 NATO Chamber
1 in 7" twist
Carbine length gas
Low profile gas block
A2 Flash Hider