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The PWS Enhanced Buffer Tube is the first major upgrade and improvement to the buffer tube in years! This one piece billet buffer tube is CNC machined out of solid 7075 aluminum in order to gain lightweight strength and reliability. This unit is specifically designed to work fit the HK416, but will also fit all mil-spec lower receivers. The Enhanced Buffer Tube will resolve any carrier tilt symptoms exhibited by a short stroke piston AR and will reduce felt recoil. Learn More

The Diablo Upper is Primary Weapons Systemsï¾’ answer to the 7ï¾” AR-15/M-16 series upper. Rather than simply bolting on an existing product and calling it revolutionary, PWS stepped back and designed a system from the ground up to work specifically with the extreme pressures of the 7ï¾” barrels. We started with the barrel and after careful research decided on a 7ï¾” (not 7.5ï¾”) stainless steel polygonal bore barrel with a 1:8 twist. A match bolt carrier assembly is housed inside of a MUR-1 (mil-spec) upper receiver with a billet machined charging handle. Low profile quad rails give the most possible room for accessories and XTM rail covers. The Diablo upper utilizes a long stroke piston system for additional dwell time and smooth recoil. The system is rounded out with the new CQB comp from PWS - a comp designed for short barrels that compensates, suppresses flash and directs all the blast forward.

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