Colt Ar 15 Post Ban Serial Numbers
The problem is that Colt changed their serial numbering system sometime in the late '90s or early '00s, I think. All AR's numbers before then started with SP (for Sporter) XXXXXX, now it's different. Don't know if they have different blocks for different models or what.My marked HBAR AR-15A2, bought in '90, has serial number SP 248XXX. Lower has standard pins, no mag release fence and no sear block.
Colt Year By Serial Number
Bayonet lug was milled off as this was back when the 'Assault Weapons' brouhaha was going on, so Colt attempted to 'de-assault' their rifles.didn't work.