Sig Sauer M400 Tread AR-15 Semi Auto Rifle 5.56 NATO MLOK Handguard Sig Sauer M400 Tread AR-15 Specifications

• Direct Gas Impingement System (Mid-Length)
• 5.56 NATO (Accepts .223 Remington)
• 16" Stainless Steel Barrel (Matte Bead Blasted Finish)
• 1:8" Twist Rate
• Barrel Threaded 1/2"x28
• 3 Chamber Compensator
• Forged Aluminum Upper/Lower Receivers
• Ambidextrous Controls
• Free Float M-LOK Compatible Hand Guard
• Single Stage Polished Hard Coat Trigger
• Magpul SL-K 6 Position Telescoping Stock
• SIG Sauer Pistol Grip
• Ambidextrous Charging Handle
• 30 Round Standard Pattern AR-15 Magazine (Polymer)
• Overall Length 30.8"
• Overall Width 2.5"
• Overall Height 7.5"
• Overall Weight 7lbs
• Matte Black Finish
• SKU RM400-16B-TRD
• UPC 798681597765

Sig Sauer M400 Tread Rifle Features

The M400 TREAD is an optics ready, aluminum frame rifle. The M400 TREAD features a 16” stainless steel barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous controls, a Magpul™ SL-K 6 position telescoping stock, a mid-length gas system, and is available in the AR-15 caliber 5.56 NATO.

Barrel, Receiver and Gas System

The barrel is mechanically mated to the receiver by means of a barrel nut, and the barrel extension. The flash suppressor if applicable is screwed onto the muzzle end of the barrel via 1/2 x 28 TPI thread pattern. The front sight housing, which is fitted to the barrel, contains the gas port and the front sight. The upper receiver has an integral M1913 accessory rail for attachment of sights or optics.

Hand Guard

The hand guard protects the barrel and the gas system from damage and provides protection from barrel heat.

Lower Receiver Assembly and Buttstock

The lower receiver assembly contains the fire control mechanism, bolt catch, magazine well, magazine release, pistol grip, sling attachment points, and buttstock assembly. The fire control selector is ambidextrous along with the magazine catch. The fire control selector has two positions, SAFE and Semi-Auto (depending on model).

The SIG M400 TREAD rifle is a direct impingment rifle with a rotary bolt mechanism capable of semi-automatic or full automatic fire operation. Semi-Automatic is defined as one round being fired each time the trigger is pressed to the rear until the magazine is depleted of ammunition.

Buttstock Operation

The SIGM400 is equipped with a telescoping buttstock. The buttstock may vary depending on the model. The buttstock on the SIGM400 may vary depending on the specific model you have. The buttstock provides for easy adjustment of the length to accommodate the individual shooter or for storage. To adjust the length of the buttstock, fully depress the release latch and pull the stock rearward to extend or push the stock forward to collapse.

Intermediate positions may be selected by partially depressing the release latch and moving the stock to the desired position.

Sights

The Sig Sauer M400 TREAD AR-15 rifle features integrated MIL-STD 1913 rails on the upper receiver. These rails may be used for attaching a variety of sighting systems, both optical and fixed. These sights are designed to provide a simple, durable sighting solution should you decide not to use an optical device.