Frag Out! Magazine
Issue link: https://fragout.uberflip.com/i/1193118
The ACR's regulator has locking button which locks it in the gas block's body WYCIĘĆIE. It must be pressed before unlocking. Other parts are also different. The ACR has piston attached to the long pi- ston rod with spring. In MSBS the- se parts are separate and piston rod is guided through the part per- manently attached to the barrel. In ACR , the piston rod is guided thro- ugh two-piece guide block which must be loosen to remove the pi- ston. In both rifles, the guiding ele- ment doubles as gas piston spring buffer. Bolt carrier groups are similar on the outside, but details are dif- ferent. ACR has cam pin on the left side of the bolt carrier. MSBS has cam pin on the right, inside the bolt carrier (the process hole is covered with welded cap). Also, the bolt carrier is different on the bottom and heavier. The ACR lacks capability to change the side of case extraction, so the bolt is completely different than in MSBS. ACR cam pin hole is asymmetrical and pin might be inserted from one side only. MSBS has symme- trical cam pin hole what allows to rotate bolt 180 deg. Masada bolt is closer to AR-15/18 ones and the MSBS has similar to G36 one. Fi- ring pins are completely different: ACR firing pin has spring. Cam pins are different, firing pin cams are almost same. Recoil springs with rods and buffer share similar idea. The ACR recoil spring and rod are connec- ted with bolt carrier: they must be placed in proper hole and then rotate 45 degree (to connect bolt carrier group with recoil spring). In MSBS these parts are not connec- ted, bolt carrier group is placed on GROT regulator gazowy obsada lufy odbijacz łusek i okno wyrzutowe tylec komory zamkowej rozłożony zespół ruchomy FIREARMS