顾名思义,SIG516 CQB型步枪是SIG516系列中的一款短枪管型近距离作战步枪,枪管长仅254mm,仅能半自动发射,也可根据用户需求增加连发功能。该枪采用了西格公司M400卡宾枪下机匣,上机匣顶部及护手四周均设有皮卡汀尼导轨,顶部导轨上安装了可快速折叠的机械瞄具。该枪采用活塞短行程导气式自动方式,活塞上设有缓冲复位簧,以保障活塞可靠复位,气体调节器有4个档位,分别是小 As the name suggests, the SIG516 CQB rifle is a short barrel rifle in the SIG516 series, with a barrel length of only 254 mm, which can only be fired semi-automatically, as well as to increase the burst function as required by the user. The gun uses a Sieger M400 carbine under the receiver, the top of the receiver and armor are equipped with Picatinny rail around, the top rail mounted on a quick folding mechanical sights. The gun piston short stroke air conduction automatic mode, the piston is provided with a cushioning return spring to ensure reliable piston reset, the gas regulator has 4 stalls, respectively, small