MIL-DTL-12560K (MR)
APPENDIX A
TABLE A-IX. Minimum required ballistic limits (protection criteria) for class 2 armor, firing
obliquity: 0°, projectile: caliber .50 FSP.
Thickness,
Required
Thickness,
Required
Thickness,
Required
inches
BL(P), ft/sec
inches
BL(P), ft/sec
inches
BL(P), ft/sec
0.230
1730
0.340
2466
0.450
3202
0.235
1763
0.345
2499
0.455
3235
0.240
1797
0.350
2532
0.460
3268
0.245
1830
0.355
2566
0.465
3302
0.250 1/
1864
0.360
2599
0.470
3335
0.255
1897
0.365
2633
0.475
3369
0.260
1930
0.370
2666
0.480
3402
0.265
1964
0.375
2700
0.485
3436
0.270
1997
0.380
2733
0.490
3469
0.275
2031
0.385
2767
0.495
3503
0.499 2/
0.280
2064
0.390
2800
3529
0.285
2098
0.395
2834
0.500
3536
0.290
2131
0.400
2867
0.505
3569
0.295
2165
0.405
2900
0.510
3603
0.300
2198
0.410
2934
0.515
3636
0.305
2231
0.415
2967
0.520
3670
0.310
2265
0.420
3001
0.525
3703
0.315
2298
0.425
3034
0.530
3737
0.320
2332
0.430
3068
0.535
3770
0.325
2365
0.435
3101
0.540
3804
0.330
2399
0.440
3135
0.545
3837
0.335
2432
0.445
3168
0.550
3871
1/
Specification requirements begin for this ordered thickness
2/
Specification requirements end for this ordered thickness.
Note: Tabulated values on either side of the specification requirements are for interpolation
of BL(P) requirements on undersize or oversize plates.
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