#Piston

Sig had many weapons on display at IWA, including several 516s. One was actually Made in Germany and featured a number of differences from the US-market 516s, which I go over in the video. I’m not sure exactly where in Germany it was made, because I saw no signs of AR production at Eckernförde, where Sig pistols are produced. I’m thinking that it was produced and assembled along with the Blaser rifles at that factory, which is in a different part of the country.

Stag Arms’s newest AR-15 is the piston operated Model 8 carbine.

Murdoc has written a review of the Adam Arms retrofit piston system for the AR-15 for Guns and Hunting.

This year Smith & Wesson have launched the M&P15 PS and PSX piston operated AR-15 rifles.

This video clip is from a marketing video made by H&K comparing the 10″ barreled HK 416 with the M4 when fired full of water, immediately after being submerged.

Over the past few months Colt has been unveiling a variety of new AR-15 firearms. If a replacement for the M16 or M4 is chosen they want it to be a Colt. To ensure this designed a range of weapons that should cover all bases. David @ Defense Review has been relentlessly covering the new firearms.

Jennersen was kind enough to photograph his Bushmaster A3M4 Gas Piston system for me. He took some really good shots.

The POF-USA P-308 is a interesting rifle. It is a gas piston operated rifle, based on the AR-10/AR-15 design and requires no lubrication.