For sale Palmetto State Armory M4 Magpul Upper

One other comment to add...

I have a brand new nickel boron BCG and Troy fixed rear battle sight I will include in the deal for $150.

That appears to be the front sling swivel. It was just pushed forward in the picture.

Here are the specs...

Barrel Length: 16"

Gas System: Carbine-Length

Barrel Profile: M4

Barrel Steel: 4150V Chrome Moly

Barrel Finish: Phosphate

Chrome Lining: none

Muzzle Thread: 1/2x28

Chamber: 5.56 NATO

Twist Rate: 1 in 7"

Barrel Extension: M4

Diameter at Gas Block: .750"

Gas Block Type: F-marked Front Sight Base

Muzzle Device: A2 Flash Hider

Receiver Material: Forged 7075 T6

Receiver Type: M4

Handguard Type: Magpul MOE Black Handguards

I could be interested, live in St. Mary's .... but have a question.

What is that nipple looking thing under the FSB, apparently protruding from the front of the lower hand guard. Is that a gas valve adjustment?

I currently have a Pre-SB281 Colt 6920 and 6940 that I could use this on, but neither has that pointy thing under the gas block. So I'm curious.

Is the barrel chrome lined?