Per your request, @GySgt Karelia, all weapons and special/unique attachments for them are listed below. I did not get the special magazines for the G3 and HK33 series of rifles since they take standard RHS & ACE 7.62/5.56 NATO magazines, respectively. If you really wanna go the distance and put in the 50 round G3 mag I'm sure some nerd would love you for it, but I ain't that nerd and they can write their own damned request.
UK3CB_G3SG1
UK3CB_G3SG1_RIS
UK3CB_G3A3
UK3CB_G3A3_RIS
UK3CB_G3A3V
UK3CB_G3A3V_RIS
UK3CB_G3KA4
UK3CB_G3KA4_GL
uk3cb_optic_accupoint_g3
uk3cb_optic_pvs4_g3
uk3cb_optic_stanagzf_g3
uk3cb_optic_stanagzf2d_g3
uk3cb_optic_zfsg1
UK3CB_PSG1A1
UK3CB_PSG1A1_RIS
UK3CB_HK33KA1
UK3CB_HK33KA2
UK3CB_HK33KA2_RIS
UK3CB_HK33KA2_RIS_GL
UK3CB_HK33KA3
UK3CB_MG3_Railed
UK3CB_MG3_KWS_B
UK3CB_MG3_KWS_G
UK3CB_MG3_KWS_T
uk3cb_muzzle_snds_g3
uk3cb_muzzle_snds_hk33
rhs_weap_m14
rhs_weap_m14_d
rhs_weap_m14_fiberglass
rhs_weap_m14_rail
rhs_weap_m14_rail_d
rhs_weap_m14_rail_fiberglass
rhs_weap_m14_rail_wd
rhs_weap_m14_ris
rhs_weap_m14_ris_d
rhs_weap_m14_ris_fiberglass
rhs_weap_m14_ris_wd
rhs_weap_m14_socom
rhs_weap_m14_socom_rail
rhs_weap_m14_wd
rhsusf_acc_aac_m14dcqd_silencer
rhsusf_acc_aac_m14dcqd_silencer_d
rhsusf_acc_aac_m14dcqd_silencer_wd
rhsusf_acc_m14_flashsuppressor