safety
piston
M4RIS back sight
M4 CQB outside barrel(aluminum)
M4 CQB outside barrel lengthening(aluminum)
M4 CQB outside barrel + lengthening barrel (aluminum)
M4A1 outside barrel(aluminum )
M16A3 outside barrel(sy009)
M4 front sight
M4 ring
1911 suite
M024 M4SS folding rear sight