MIL-DTL-12560K (MR)
APPENDIX A
TABLE A-XI. Minimum required ballistic limits (protection criteria) for class 4 armor, firing
obliquity: 30°, projectile: caliber .30 M2 AP.
Thickness
Required
Thickness
Required
Thickness
Required
inches
BL(P), ft/sec
inches
BL(P), ft/sec
inches
BL(P), ft/sec
0.210
1927
0.265
2329
0.325
2650
0.215
0.270
0.330
1969
2359
2674
0.220
0.275
0.335
2010
2389
2697
0.225
2050
0.280
2418
0.340
2719
0.230
0.285
0.345
2741
2088
2447
0.231 1/
0.290
0.350
2763
2096
2474
0.354 2/
0.235
0.295
2780
2126
2501
0.240
0.300
0.355
2785
2162
2527
0.245
0.305
0.360
2807
2197
2553
0.250
0.310
0.365
2829
2232
2578
0.255
0.315
0.370
2851
2265
2603
0.260
0.320
0.375
2873
2297
2627
1/
Specification requirements begin for this ordered thickness.
2/
Specification requirements end for this ordered thickness.
Note: Tabulated values on either side of the ordered thicknesses are for interpolation
of BL(P) requirements on undersize or oversize plates.
47
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