AR15 16″ M-LOK 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.

*As this product is under our 3D printing section, some part(s) must be 3D printed by the end user to complete this build*

Does not ship to NJ, WA, or internationally.

* Does NOT contain U-bolt

1 in stock



Material | 4150 CMV

Caliber | 5.56 NATO

Twist | 1:7

Length | 16″

Gas System |  Carbine

Finish | Nitride

Thread | 1/2-28

Extension | M4

Upper Receiver

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


Lightweight Aluminum

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 [2] | Detents [2]

Buffer Retainer Pin | Spring

Magpul MOE Grip | Trigger guard

Buffer Tube

7075 mil-spec carbine receiver extension

5-position adjustable

Castle Nut

Latch Plate

Standard Carbine Buffer

Carbine Length Spring

Additional Notes

16″ 4150 CMV

Nitride treated

5.56 NATO Chamber

1 in 7″ twist

Carbine length gas

Low profile gas block

A2 Flash Hider

Additional information

Weight 112 oz
Dimensions 32 × 8 × 4 in