Pkr Machine

Figure Page

7-6 Operating Cycle of Gas-Actuated Single-Barrel Rotary Cannon. Bore Sealed by Obturating Ring 419

7-7 Method of Firing Multi-Projectile Loaded Round 420

7-8 Operating Cycle of Multi-Barrel Motorized Rotary Cannon 421

7-9 Mechanism for Revolving Rotary-Type Feed 422 423

7-10 Method of Revolving a Rotary Cannon Cylinder 424

7-11 Method of Scaling Bore on a Rotary Cannon 424

8-1 Recoil-Loaded Spring Accelerates Bolt to Rear 425

8-2 Pivoted Lever Accelerates Bolt to Rear 426

8 3 Twin Levers Accelerate Bolt to Rear 426

8 4 Gas Pressure on Muzzle Accelerates Barrel to Rear 427

8-5 Gas Pressure on Muzzle Accelerates Barrel to Rear 427

8- 6 Muzzle insert Allows Pressure on Barrel To Be Varied 427

8-7 Rotation of Unlocking Bolt Head Accelerates the Body of the Bolt to the Rear . . 428

8-8 Pivoted Lever and Cam Accelerate Boh to Rear 429

8-9 Pivoted Lever Accelerates Bolt to Rear 429

8-10 Recoil Operated Accelerator Forces Bolt to Rear and Also Acts as Barrel Extension Buffer 430

8-11 Cam-Operated Inertia Block Accelerates Bolt to Rear 431

9 1 Various Methods of Gas Port Adjustment 433

9 2 Various Methods of Gas Port Adjustment 434

9 3 Methods of Carbon Removal and Preventing Carbon Build Up 435

9 4 Various Methods of Adjusting, Utilizing and Retarding Gas Pressure 436

9 -5 Various Methods of Supporting and Removing Gas Pistons 437

10-1 Various Methods of Retaining Barrels 439

10-2 Various Methods of Retaining Barrels and Barrel Jackets 440

10-3 Various Methods of Retaining Barrels 441

10-4 Various Methods of Supporting and Unlocking Barrels 442

10 5 Barrel Hold-Back Device . 443

10-6 Method of Retaining Barrel 444

11-1 Various Methods of Retaining and Powering Extractors 445

11-2 Various Methods of Retaining and Powering Extractors 446

11 3 Methods of Retaining and Powering Extractors 447

11-4 Methods of Retaining and Powering Extractors 448

11-5 Methods of Retaining and Powering Extractors 449

11 6 Methods of Retaining and Powering Extractors 450

11-7 Methods of Retaining and Powering Extractors 451

11-8 Impact of Initial Extraction Actuates Bolt Unlocking 452

11-9 Methods of Assisting and Obtaining Initial Extraction 453

12-1 Operation of Cam-Actuated Ejector 455

12-2 Methods of Retaining and Operating Ejectors 456

12-3 Methods of Retaining and Operating Ejectors 457

12-4 Operation of Cam-Actuated Ejector 458

12-5 Method of Operating Cam-Actuated Ejector 459

12 6 Buffer Operated Ejector 460

12-7 Method of Obtaining Forward Ejection 460

12 8 Method of Obtaining Forward Ejection . . 461

12 9 Operation of Gas Ejector 462

12-10 Combination Buffer and Ejector 462

12 11 Ejection Port Closure Devices 463

13 -1 Operation of Sear Mechanisms 465

13-2 Operation oi Sear Mechanism and Sear Buffer 466

13-3 Operation of Scar Mechanisms 467

13-4 Operating Cycle of Sear Mechanism 468

Figure Vagf

13-5 Operating Cycle of Sear Mechanism and Safety Latches 469

13-6 Operating Cycle of Sear Mechanism 470

13-7 Air-Operated Sear 470

13-8 Operating Cycle of Scar Mechanism, Sear Buffer and Safety Latch 471

13-9 Method of Attaining Controlled Rate of Fire 472

13-10 Sear Operated by Locking Block 472

13-11 Operating Cycle of Sear Mechanism 473

13-12 Operating Cycle of Scar Mechanism During Semi-Automatic Fire 474

13-13 Operating Cycle of Scar Mechanism During Full Automatic Fire 475

13 14 Operating Cycle of Sear Mechanism 476

13 15 Method of Firing During Counter-Recoil 477

13-16 Operating Cycle of ┬╗Sear Mechanism 478

14-1 Types of Firing Pins 479

14-2 Methods of Retaining and Removing Firing Pins 480

14-3 Cam-Operated Firing Pins 481

14-4 Methods of Retaining and Removing Firing Pins 482

15-1 Buffer Materials and Buffer Devices 483

15-2 Methods of Retaining Buffers 484

15-3 Methods of Retaining Buffers 485

15-4 Types of Multiple Buffers 486

15 5 Unique Types of Buffers 487

15-6 Types of Adjustable Buffers (Gas and Mechanical) 488

15-7 Examples of Mounting Lug Placement 489

15-8 Types of Adjustable Mounts 490

16-1 Operation of Air Charger 491

16-2 Operating Cycle of Self-Cocking Charger 492

16-3 Air-Operated Charger Double Acting 493

16-4 Steel Rings Seal Charger Piston 493

17-1 Types of Muzzle Brakes and Flash Hiders 495

17-2 Types of Muzzle Brakes and Flash Hiders 496

17 3 Types of Muzzle Brakes and Flash Hiders 497

18 1 Methods of Attaching Machined Parts to Sheet Metal Receivers 499

18-2 Types of Retaining Devices 500

18-3 Operation of a Bolt Lock 500

18-4 Hold Open and Cover Retaining Device 501

18-5 Barrel Return Spring Also Holds Receiver Cover Up 502

19-1 Method of Regulating Spring Tension To Change the Rate of Fire 503

19-2 Method of Retaining an External Captive Recoil Spring 504

19-3 Captive Spring Used To Return Breech Bolt and Operating Rod 504

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