Gas springs contain both pressurized gas and liquid and are used as lifting mechanisms to support and maneuver heavy items and other external forces. They usually begin with a few letters including 'SPD', 'SL', 'GSNI', 'ML', or, in the case of less reputable manufacturers, 'POS'. Part numbers are usually printed on the body of the old gas spring. The most common approach to choosing a new Attwood gas spring is to simple use the part number of the old spring, even if it wasn't an Attwood SpringLift part - which may explain why you have to replace it! To Find Your Attwood Springlift Gas Spring By Part Number Attwood springs come with support to ensure the proper spring for your specific application. All springs pass the tough Attwood Salt Spray and a 30,000 cycle life test. All are made with bio-degradable no hazard to water grade oil, making them the marine industry’s most environmentally friendly gas springs. Note: Does NOT include a bolt carrier group and charging handle.Attwood Springlift is one of the world's leading suppliers of gas springs. Charging handles come in many variations and all quality makes and models should work fine with our complete uppers.

*We Recommend DSG Standard and Enhanced Bolt Carrier Groups for guaranteed trouble-free and reliable performance. More on DSG Complete Upper Assembly Process and Verification process are available in the Blog section of our website. 223 Wylde Barrel Profile: Govt Medium Twist: 1:8 Barrel Thread: 1/2 x 28 Barrel Gas Block Size: 0.750 Gas System Length: Midlength Barrel Crown: Step Crown Barrel Finish: 80 Grit Bead Blast Barrel Extension Finish: Nickel BoronĭSG Complete Duty Series Uppers are assembled and test fired by DSG armorers. 223 Wylde Barrel Specifications: Barrel Length: 16.0″ Barrel Weight: 28 oz Barrel Material: 416R Stainless Steel Barrel Caliber. Marked: Defense Solutions Group Inc CAGE: 1L0J5 and has the DSG badge on the opposite side.ġ6' Precision Series Govt Profile. The G4 handguard has built-in anti-rotation features, five QD swivel locations machined into the handguard, and are hard coat anodized. This complete upper includes our G4 M-Lok handguard and includes one Picatinny rail section for accessory installation.

The barrel has been pre-dimpled (1) for gas block installation. 223 Wylde chamber, button rifled, MP & HPI tested, Mid-length gas system, Nickel Boron coated barrel extension, step crown, and an A2 flash suppressor with crush washer. The barrel is 416R Stainless with 1:8 twist, 16″ Government profile with. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized.

Mil-Spec upper receiver with M4 feed ramps.

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