Yankee Hill Machine Company 3-Lug 1-3/8×24 Thread Pattern

This Rifle has a 16″ 1×7 Mid Length Light Weight Barrel, MilSpec M4 Buttstock, 15″ MLOK Free Float Tube, and A2 Flash Hider. The rifle also comes with 1 x 30rd Magazine and a CA approved Gun Lock. Ships with a Chamber Safety Tool in the chamber, showing clearly the weapon is unloaded.
Specifications:

Barrel:

Chrome Moly Vanadium
M4 Feed Ramps
16″ Length
1×7 Twist
A2 Flash Hider
Manganese Phosphated
Phosphated under Gas Block
DTI Low Profile Gas Block
Threaded Muzzle
Light Weight Profile

Chamber:

5.56 X 45 mm

Bolt And Carrier:

Phosphated 8620 Steel Carrier Assembly
Heat Treated and Plated
Mil-Spec
Chrome Lined Carrier Interior
Carrier Key – chrome lined, attached with Grade 8 Screws
Properly Staked & Sealed Gas Key

Handguards:

15″ MLOK Free Float

Upper Receiver:

Forged 7075 T6 Aluminum
Flat Top With M4 Feed Ramps
Hard Coat Anodized
Mil-Spec
Ejection Port Cover and Round Foward Assist
Right Hand Ejection

Lower Receiver:

Forged 7075 T6 Aluminum
Hard Coat Anodized
Mil-Spec
Aluminum Triggerguard
Semi-Auto
Aluminum Mag Catch Button

Buttstock:

M4 5 Position
Mil-Spec Buffer Tube

Weight:

6.2 lbs Empty

Length:

36.375″ Fully Extended
32.625 Collapsed

Accessories:

1 x 30rd Magazine
Gun Lock