https://palmettostatearmory.com/psa-16-m4-carbine-length-5-56-nato-1-7-nitride-lightweight-m-lok-classic-rifle-5165450254.html

PRODUCT DETAILS

DETAILS

PSA 16" M4 Carbine-Length 5.56 NATO 1/7 Nitride Lightweight M-Lok Classic Rifle - 5165450254

Barrel Length: 16”
Barrel Material: 4150V Chrome Moly Vanadium Steel
Barrel Finish: Nitride
Barrel Profile: M4
Chamber: 5.56 NATO
Twist Rate: 1 in 7”
Extension: M4
Gas System: Carbine-Length
Gas Block Type: Low Profile .750” Diameter
Upper Receiver: Forged 7075 T6 Aluminum
Receiver Style: M4 Flat top with feed ramps
Receiver Finish: Hardcoat Anodized
Forward Assist: Yes
Dust Cover: Yes
Handguard Style: PSA 13.5" Lightweight M-Lok Free Float Rail
Bolt Steel: Carpenter 158, Mag Phosphate coated
Bolt Carrier Steel: 8620, Chrome Lined 
Staked Gas Key: Yes
Lower Receiver: Forged 7075 T6 Aluminum
Receiver Finish: Hardcoat Anodized
Fire Control Group: PSA AR-15 Mil-Spec Fire Control Group
Buffer Tube: 7075 T6 Aluminum Mil-Spec Tube
Adjustment: 6-position collapsible
Stock: PSA Classic Carbine Stock
Magazine: (1) 30-Round Magazine (where available by law)
Weight: 7 Lbs
Length: 32"

FEATURES

Barrel: Chrome-moly vanadium steel barrel chambered in 5.56 NATO, with a 1:7 twist rate, M4 barrel extension, and a carbine-length gas system.  M4 profile barrel is finished off with a 13.5” PSA Lightweight M-Lok free-float handguard, low-profile gas block, and A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized.  Uppers include forward assist and dust cover.  These uppers are made for us right here in the USA by a mil-spec manufacturer.

Bolt Carrier Group: Full-auto profile bolt carrier group. Shot-peened, mil-spec Carpenter 158 steel bolt. Gas Key Hardened to USGI Specifications, fastened with Grade 8 screws, and Staked Per Mil-Spec. Carrier is 8620 steel M-16 full auto profile and is chrome lined and phosphate coated.

Lower: These forged lowers are quality made using 7075-T6 aluminum and are marked "MULTI" for the caliber. Finish is hard-coat anodized. The Mil-spec diameter 7075-T6 buffer tube is hard-coat anodized, has 6 adjustment positions, and is fitted with a PSA Classic Carbine Stock for a traditional AR-15 look and feel. The rifle is finished off with a PSA Classic A2 grip, and standard Mil-Spec AR-15 Fire Control Group.