REC7是巴雷特公司推出的一款采用活塞导气式自动原理的半自动步枪,其有两种口径型,其中的一种因较早采用了雷明顿公司的6.8mm SPC弹而颇受关注,但市场景况并不看好,反而是常用的5.56×45mm NATO弹口径型更受欢迎。REC7 GenⅡ半自动步枪是REC7的第二代升级版,同样有两种口径型。两种口径型的活塞导气系统有所改进,气体调节器两位置可调,为保证活塞杆强度,活塞采用一整块8620钢加工而 The REC7 is Barrett’s semi-automatic rifle with piston-pilot automatic principle, which has two caliber models, one of which is of interest due to the earlier use of Remington’s 6.8mm SPC bombs , But the market is not optimistic about the situation, but is commonly used 5.56 × 45mm NATO caliber more popular. REC7 GenⅡ semi-automatic rifle REC7 is the second generation upgrade, there are two caliber. Two caliber piston air conduction system has been improved, adjustable gas position two positions, in order to ensure the strength of the piston rod, the piston uses a piece of 8620 steel processing and