DPMS GII AP4 .308 Win Matte Black AR-Style Semi-Automatic Rifle

A: Yes. It will lockup tightly on the 16 inch profile barrel..

A: It will be a solid fit and make the bayonet very strong for use.

A: Shawn from what I can gather it's (The factory gas port is .088). However, I can't swear to this. I would suggest you contact DPMS to be absolutely sure so you switch goes without a hitch: DPMS Consumer Service Phone: 1-800-578-3767 (Mon-Fri 9:00 AM -5:00 PM EST) - Email: info@dpmsinc.com

A: The port in the barrel should be .088, but the only hole in the gas block that matters is the internal diameter where it goes over the barrel which should be .750. Some rifles will measure slightly less on either side of the gas block so when you measure take the block off and measure the mating surface.

A: Mike, this is direct impingement. You can also just barely see the gas tube between the delta ring and the receiver in the picture.

A: its a direct Impingement system see **** Specifications and Features: DPMS GII AP4 AR Style Semi Auto Rifle RFLR-G2AP4 (60220) *********Direct Gas Impingement Rifle System .308 Winchester (Accepts 7.62x51 NATO) 16" Lightweight 4150 Steel Barrel (Chrome Lined) 1:10" Twist Rate Forged 7075-T6 Aluminum Upper/Lower Receiver Type III Hard Coat Anodized Teflon Coated Finish A3 Flat Top Upper Receiver (Mil-STD-1913 Picatinny Rail) DPMS Cancellation Muzzle Device 19 Round Magazine DPMS LR-308/SR-25 Compatible Magazine Pattern F Marked Front Sight Base Magpul MBUS Rear Sight Glacier Guard Polymer Hand Guard A2 Polymer Pistol Grip Standard AR Fire Control Group M4 6 Position Collapsible Stock Overall Length 34.25" Collapsed Overall Weight 7.25lbs Matte Black Finish

A: Mike, the DPMS RFLR-G2AP4 GII AP4 20+1 308WIN is "Direct Impingement" operated Sir.

A: Mike, Direct gas impingement with carbine length gas system. .075 gas block. Only piston action is locking lug bolt inside of bolt carrier tube.