贝贝-
小口径手枪、步枪子弹口径弹壳附注长度形状.22 BB Cap5.59 mm7 mmRim, Sany weapon in 22 LR (manually operated).22 CB Cap5.59 mm11 mmRim, Sany weapon in 22 LR (manually-operated).22 Short5.59 mm11 mmRim, S .22 Long5.59 mm15 mmRim, S .22 Long Rifle
.22 LR5.7 mm15 mmRim, SRuger 10/22.22 Stinger5.59 mm18 mmRim, Sany weapon in 22 LR.22 WRF
.22 Win. Rim Fire5.59 mm24 mmRim, SColt revolver.22 Hornet5.59 mm Rim, S .22 WMR
.22 Win. Magnum Rimfire5.59 mm27 mmRim, SRuger 96/22H手枪子弹口径弹壳附注长度形状5.45 mm USSR
5.45 mm Soviet5.45 mm17.8 mmRimlessPSM5.7x28 mm P90
5.7 mm FN5.7 mm28 mmRimless, BNFN P90, Five-eleveN.25 ACP
6.35 mm Browning6.35 mm17.3 mmSemi-Rim, SFN Browning M19067.62 mm Tokarev7.62 mm25.1 mmRimlessTokarev TT-337.62 mm Nagant
7.62 mm Russian Revolver7.62 mm38.9 mmRimNagant M18957.63 mm Mannlicher7.63 mm21.3 mmAustria7.63 mm Mauser7.63 mm25.1 mmRimless, BNMauser C/96.32 ACP
7.65 mm Browning7.65 mm17.3 mmSemi-Rim, SFN Browning M19007.65 mm Long7.65 mm19.8 mmRimlessFrench M19357.65 mm Luger
Cal .30 Luger7.65 mm21.6 mmRimlessBergmann MP 28.32 S&W8.13 mm15 mmRimmed, S.32 Short Colt
.320 Revolver8.13 mm Rimmed, S.32 Long Colt
.32 S&W Gallery8.13 mm23 mmRimmed, S.32 S&W Long
.32 Colt New Police8.13 mm24 mmRimmed, S8 mm Japanese
8 mm Nambu8 mm21.8 mmSemi-rimJapanese Type 148 mm French Ordnance
8 mm Lebel (revolver)8 mm27.3 mmRimmedFrench Lebel M1892.357 SIG9 mm22 mmRimless, BNSIG P229.357 Magnum9 mm33 mmRim, BN.357 Maximum9 mm40 mmRim, BN.380 ACP
9 mm Browning Short9 mm17 mmRimless, SColt M1908 Pocket Hammerless9 mm Makarov
9x18 mm Soviet9 mm18 mmRimless, S9 mm Police
9 mm Ultra9 mm18 mmRimlessSIG P2309x19 mm NATO
9 mm Parabellum
9 mm Luger9 mm19 mmRimless, SWalther P38.38 S&W
.38 Mk II9 mm20 mmRim, BNEnfield No. 29 mm Browning Long9 mm20.3 mmSemi-Rim.38 Short Colt9 mm Semi-rimmed, S9x21 mm
9 mm IMI9 mm21 mmRimless9 mm Bergmann Bayard
9 mm Largo9 mm23 mmRimless9x23 mm Winchester9 mm23 mmRimless.38 Colt Auto
.38 Super9 mm23 mmSemi-RimColt M1900.38 Long Colt9 mm26.2 mmRimColt M 1892 New Army.38 Special
.38 S&W Special9 mm29 mmRim, S .40 S&W
.40 Auto10 mm21 mmRimless, S10 mm Auto10 mm25 mmRimless, BNBren Ten.41 Action Express10.41 mm22 mmRebated, S.41 Magnum
.41 Rem. Magnum10.41 mm33 mmRimmed, S.44 Russian10.97 mm29 mmRimmed.44 Magnum
.44 Rem. Magnum10.97 mm33 mmRimmed, S.44 Auto Mag
.44 AMP11.18 mm33 mmRimless, SAMT Auto Mag.45 ACP11.43 mm23 mmRimless, SColt M1911A1.45 Super11.43 mm23 mmRimless, S.45 Win. Magnum11.43 mm30 mmRimlessAMT AUto Mag IV.45 Long Colt11.43 mm32 mmRimmed, BNColt Single-Action Army.454 Casull11.53 mm35 mmRimmed.455 Revolver11.56 mm19 mmRimmedWebley No. 1.50 ACtion Express
.50 Magnum12.7 mm33 mmRebatedAMT Auto Mag V步枪子弹口径弹壳附注长度形状.17 Remington4.32 mm30 mm&bnsp;Remington 700 BDL4.73 DM1 Caseless
4.73x33mm4.73 mm33 mmcaselessH&K G115.45mm M1974 USSR
5.45x39mm Soviet5.45 mm39 mmAK-74.22 Hornet5.59 mm36 mmRimmed, SRuger 77/22 RH.222 Remington5.7 mm43 mmRimless, BN.223 Remington
5.56 mm NATO5.56 mm45 mmRimless, BNUS M16.22-2505.59 mm49 mmRimless, BN.243 Win6.17 mm51 mmRimless, BNRemington Model 700 SS6.5mm Arisaka6.5 mm50 mmSemi-rimmed, BNJapanese Type 386.5mm Italian
6.5mm Mannlicher6.5 mm52 mmRimless, BNItalian M916.5mm Dutch6.5 mm53 mmRimmed, BNDutch M926.5mm Mauser
6.5mm Swedish6.5 mm55 mmRimless, BNSwedish M42.270 Win.6.86 mm65 mmRimless, BN7x43mm British7 mm43 mmRimless, BNEM27mm Mauser7 mm56 mmRimless, BNSpanish M937.5mm French7.5 mm54Rimless, BNFR-F17.5mm Swiss7.5 mm55 mmRimless, BNSwiss M57.30 US Carbine7.62 mm33 mmRimless, SUS M1 Carbine7.62x39mm M1943 USSR
7.62mm Soviet7.62 mm39 mmRimless, BNAK47, AKM7.62mm NATO
.308 Win.7.62 mm51 mmRimless, BNFN FAL, M14.30-30
.30 WCF7.6252Rimmed, BNMarlin 3367.62x54mm Russian7.62 mm54 mmRimmed, BNSVD.30-40 Krag7.62 mm59 mmRimmed, BNUS M1892.30-067.62 mm63 mmRimless, BNSpringfield M1903.300 Win Mag7.62 mm66 mmBelted, BN.300 Weatherby Magnum7.62 mm72 mmBelted, BNSIG 20007.65x53mm Belgian
7.65x53mm Argentine7.65 mm53 mmRimless, BNBelgian M36.303 British7.7 mm56 mmRimmed, BNLee-Enfield No. 17.7mm Japanese Rimmed7.7 mm56 mmRimmed, BN7.7mm Japanese Semi-Rim7.7 mm57.6 mmSemi-rimmed, BN7.7mm Japanese Rimless7.7 mm58 mmRimless, BNJapanese Type 997.92x33mm German7.92 mm33 mmRimless, BNGerman StG 447.92mm Mauser
8 mm Mauser7.92 mm56 mmRimless, BNGerman G 988mm Austrian8 mm48.7 mmRimmed, BNAustrian M958mm Lebel8 mm50 mmRimmed, BNLebel M18868mm M31
8mm Hungarian8 mm56 mmRimmed, BNHungarian M35.338 Win Mag8.58 mm63 mmBelted, BNRuger M77RS Mark II.338/.416 Rigby8.59 mm71 mmRimless, BNRAI Model 300.35 Remington8.89 mm49 mmRimless, BNMarlin 336CS.375 Win9.52 mm51 mmRimmed, BNBrown Model 1.375 H&H Magnum9.52 mm72 mmBelted, BNRuger M77 Mark II Magnum.378 Weatherby Magnum9.60 mm74 mmBelted, BNWeatherby Mark V.38-409.65 mm33 mmRimmed, BN.416 Rigby10.57 mm74 mmRimless, BNRuger M77 Mark II Magnum.444 Marlin11.28 mm56 mmRimmed, BNMarlin 444SS.45-70 Government11.43 mm53 mmRimmed, BNMarlin Model 95.458 Win Mag11.63 mm64 mmBelted, BNWinchester 70 African.460 Weatherby Magnum11.68 mm74 mmBelted, BNWeatherby Mark V12.7mm USSR12.7 mm107 mmRimless, BN.50 BMG
Cal. .50 M2 Ball12.7 mm99 mmRimless, BNBarret M82 Light Fifty13.2mm Hotchkiss13.2 mm99 mmRimless, BN14.5mm B-3214.5 mm113 mmRimless, BNSimonov ATR.600 Nitro Express15.24 mm76 mmRimmed, BNHolland & Holland Express
马老四-
我楼上的回答是最全的，也是正确的，但有介于楼主问沙鹰、MP5等，可能是想写军事小说，因为现实中只有傻瓜才用沙鹰。
但楼上的回答，有英制的，又有公制的，估计楼主是看不懂。
子弹的规格有很多种，答不全的，给你一个大概映像
北约系：9毫米手枪弹、12.7X99机枪弹、狙击枪弹、5.56步枪弹
俄系：12.9X108机枪弹、狙击枪弹，7.62步枪弹、手枪弹
中系：与俄系相同，又含有9毫米手枪弹，还有11.43毫米冲锋枪弹，14.5毫米机枪弹，5.8毫米步枪枪等等
北境漫步-
全部？你确定要全部？现有枪支弹药口径种类已经商业化或装备过的超过5位数，加上野猫弹或许还能多俩零，你想全记住怕是要花上一两年，再加上使用它们的枪……下辈子见？→_→